fix: Ensure that Platform is specified by default in Release

[jeromelaban]

GitHub Issue (If applicable): related to https://github.com/unoplatform/uno/issues/16662

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the new behavior?

Building with no Platform set will use the current OS platform.

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] Docs have been added/updated which fit documentation template (for bug fixes / features)
• [ ] Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• [ ] Validated PR Screenshots Compare Test Run results.
• [ ] Contains NO breaking changes
• [ ] Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• [ ] Commits must be following the Conventional Commits specification.

Other information

Internal Issue (If applicable):

[jeromelaban]

@mergifyio backport release/stable/5.2

[mergify[bot]]

backport release/stable/5.2

✅ Backports have been created

* [#16737 fix: Ensure that Platform is specified by default in Release (backport #16720)](https://github.com/unoplatform/uno/pull/16737) has been created for branch `release/stable/5.2` but encountered conflicts

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-16720/index.html

[unodevops]

🤖 Your WebAssembly Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-16720/index.html

[nventive-devops]

The build 125024 found UI Test snapshots differences: android-28-net7: 17, android-28-net7-Snap: 33, ios: 6, ios-Snap: 84, skia-gtk-screenshots: 51, skia-linux-screenshots: 76, skia-windows-screenshots: 54, wasm: 660, wasm-automated-net7.0-UWP-Default-automated: 124, wasm-automated-net7.0-UWP-RuntimeTests-0: 0, wasm-automated-net7.0-UWP-RuntimeTests-1: 0, wasm-automated-net7.0-UWP-RuntimeTests-2: 0, wasm-automated-net7.0-WinUI-Benchmarks-automated: 0, wasm-automated-net7.0-WinUI-RuntimeTests-0: 0, wasm-automated-net7.0-WinUI-RuntimeTests-1: 0, wasm-automated-net7.0-WinUI-RuntimeTests-2: 0

Details

* `android-28-net7`: **17** changed over 829

🚨🚨 Comparison Details (first 20) 🚨🚨

- `DatePicker_PickerFlyout_PlacementsbottomLeft_True_False_True_UITests_Windows_UI_Xaml_Controls_DatePicker_DatePicker_Placement` - `Detereminate_ProgressRing_Validation25_[#FF0000_#008000_#FF0000_#FF0000]_Progress-Ring-Value-25` - `Detereminate_ProgressRing_Validation50_[#FF0000_#008000_#008000_#FF0000]_Progress-Ring-Value-50` - `ListView_SelectedItems_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewSelectedItems` - `NativeCommandBar_Size_Uno_UI_Samples_Content_UITests_CommandBar_CommandBar_Dynamic` - `NavigateBackAndForthBetweenMenuItemsAndSettings_Fluent_SamplesApp_Samples_Microsoft_UI_Xaml_Controls_NavigationViewTests_FluentStyle_FluentStyle_NavigationViewSample` - `SelectionTest_UITests_Microsoft_UI_Xaml_Controls_RadioButtonsTests_RadioButtonsPage` - `Detereminate_ProgressRing_Validation75_[#FF0000_#008000_#008000_#008000]_Progress-Ring-Value-75` - `UpDownTest_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage` - `ProgressRing_IsEnabled_Running_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220` - `ProgressRing_Visibility_Collapsed_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220` - `When_Parent_PointerMoved_After_drag_on_non-scrolling_ScrollViewer` - `When_Parent_PointerMoved_After_drag_on_ScrollViewer_-_touch` - `ImageStretch_None_Uno_UI_Samples_UITests_ImageTestsControl_Image_Stretch_None` - `When_InListView_after_scroll` - `When_InScrollViewer_after_scroll` - `DecimalFormatterTest_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage`

* `android-28-net7-Snap`: **33** changed over 1059

🚨🚨 Comparison Details (first 20) 🚨🚨

- `ListView_ListViewIncrementalLoading_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewIncrementalLoading` - `BreadcrumbBar_MUXControlsTestApp_BreadcrumbBarPage_MUXControlsTestApp_BreadcrumbBarPage` - `MUX_NumberBox_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage` - `MUX_UITests_Microsoft_UI_Xaml_Controls_SplitButtonTests_SplitButtonTestsPage_UITests_Microsoft_UI_Xaml_Controls_SplitButtonTests_SplitButtonTestsPage` - `MUX_UITests_Shared_Microsoft_UI_Xaml_Controls_TreeViewTests_TreeViewPage_UITests_Shared_Microsoft_UI_Xaml_Controls_TreeViewTests_TreeViewPage` - `Image_UITests_Windows_UI_Xaml_Controls_ImageTests_SvgImageSource_FromMsAppData_UITests_Windows_UI_Xaml_Controls_ImageTests_SvgImageSource_FromMsAppData` - `Image_UITests_Windows_UI_Xaml_Controls_ImageTests_SvgImageSource_Icons_UITests_Windows_UI_Xaml_Controls_ImageTests_SvgImageSource_Icons` - `Scrolling_MUXControlsTestApp_ScrollViewWithScrollControllersPage_MUXControlsTestApp_ScrollViewWithScrollControllersPage` - `TextBox_TextBox_Foreground_Uno_UI_Samples_Content_UITests_TextBoxControl_TextBox_Foreground` - `TextBox_TextBox_Formatting_Flicker_UITests_Shared_Windows_UI_Xaml_Controls_TextBoxTests_TextBox_Formatting_Flicker` - `TextBox_TextBox_Header_Uno_UI_Samples_Content_UITests_TextBoxControl_TextBox_Header` - `TextBox_TextBox_HorizontalAlignment_Uno_UI_Samples_Content_UITests_TextBoxControl_TextBox_HorizontalAlignment` - `ListView_ListViewLarge_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewLarge` - `Default_SamplesApp_Wasm_Windows_UI_Xaml_Controls_ListView_ListView_IsSelected_SamplesApp_Wasm_Windows_UI_Xaml_Controls_ListView_ListView_IsSelected` - `Gesture_Recognizer_Pointer_Events_test_bench_UITests_Shared_Windows_UI_Input_GestureRecognizer_PointersEvents` - `Image_ImageSourceStream_Uno_UI_Samples_UITests_ImageTestsControl_ImageSourceStream` - `SwipeControl_UITests_Windows_UI_Xaml_Controls_SwipeControlTests_SwipeControl_ScrollViewer_UITests_Windows_UI_Xaml_Controls_SwipeControlTests_SwipeControl_ScrollViewer` - `MediaPlayerElement_Mini_player_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_Minimal` - `Thumb_UITests_Windows_UI_Xaml_Controls_ThumbTests_Thumb_DragEvents_UITests_Windows_UI_Xaml_Controls_ThumbTests_Thumb_DragEvents` - `ToggleSwitch_Native_ToggleSwitch_IsOn_SamplesApp_Windows_UI_Xaml_Controls_ToggleSwitchControl_Native_ToggleSwitch_IsOn`

* `ios`: **6** changed over 269

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- `ProgressRing_IsEnabled_Running_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220` - `ProgressRing_Visibility_Collapsed_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220` - `SequentialAnimations_SamplesApp_Windows_UI_Xaml_Media_Animation_SequentialAnimationsPage` - `TextBox_UpdatedBinding_On_OneWay_Mode_UITests_Windows_UI_Xaml_Controls_TextBox_TextBox_Bindings` - `When_NoSelection_Then_PointersEvents_UITests_Windows_UI_Xaml_Controls_ListView_ListView_Selection_Pointers` - `Check_ListView_Swallows_Measure_UITests_Shared_Windows_UI_Xaml_Controls_ListView_ListView_With_ListViews_Count_Measure`

* `ios-Snap`: **84** changed over 1050

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- `Brushes_ImageBrushStretch_Uno_UI_Samples_UITests_ImageBrushTestControl_ImageBrushStretch` - `Path_PathTime_SamplesApp_Windows_UI_Xaml_Shapes_PathTestsControl_PathTime` - `Path_PathVerticalOffsetAdjustable_SamplesApp_Windows_UI_Xaml_Shapes_PathTestsControl_PathVerticalOffsetAdjustable` - `Path_FixedWidth_SamplesApp_Windows_UI_Xaml_Shapes_PathTestsControl_FixedWidth` - `Path_Invisible_SamplesApp_Windows_UI_Xaml_Shapes_PathTestsControl_Invisible` - `Path_PathBindingOnData_SamplesApp_Windows_UI_Xaml_Shapes_PathTestsControl_PathBindingOnData` - `TextBlock_Simple_Contrained_Horizontal_Center_Wrap2_Uno_UI_Samples_Content_UITests_TextBlockControl_Simple_Contrained_Horizontal_Center_Wrap2` - `TextBlock_Simple_Text_Uno_UI_Samples_Content_UITests_TextBlockControl_Simple_Text` - `TextBlock_Textblocktimespancustomformat_Uno_UI_Samples_Content_UITests_TextBlockControl_Textblocktimespancustomformat` - `TextBlock_TextBlock_CharacterSpacing_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlock_CharacterSpacing` - `NumberBox_UITests_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBox_Header_UITests_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBox_Header` - `Other_controls_ChatBox_UITests_Shared_Windows_UI_Xaml_Controls_ChatBox_ChatBox` - `PagerControl_UITests_Microsoft_UI_Xaml_Controls_PagerControlTests_PagerControlPage_UITests_Microsoft_UI_Xaml_Controls_PagerControlTests_PagerControlPage` - `Page_UITests_Windows_UI_Xaml_Controls_PageTests_Page_Automated_UITests_Windows_UI_Xaml_Controls_PageTests_Page_Automated` - `TextBlock_SimpleText_MaxLines_One_Uno_UI_Samples_Content_UITests_TextBlockControl_SimpleText_MaxLines_One` - `TextBlock_SimpleText_MaxLines_Two_with_Different_Fonts_Uno_UI_Samples_Content_UITests_TextBlockControl_SimpleText_MaxLines_Two_with_Different_Fonts` - `Image_ImageSourceStream_Uno_UI_Samples_UITests_ImageTestsControl_ImageSourceStream` - `MediaPlayerElement_Mini_player_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_Minimal` - `TextBlock_TextBlock_Hyperlink_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlock_Hyperlink` - `TextBlock_TextBlock_Inlines_TemplatedParent_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlock_Inlines_TemplatedParent`

* `skia-gtk-screenshots`: **51** changed over 2190

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- `FluentStyle_NavigationViewSample.png` - `VisualState_AdaptiveTrigger_Storyboard.png-dark` - `VisualState_AdaptiveTrigger_Storyboard.png` - `Window_SetBackground.png-dark` - `Window_SetBackground.png` - `ColorPickerSample.png` - `PanelImageBrush.png` - `RectanglemaskingRectangleGrid.png` - `TransformToVisual_Simple.png-dark` - `TransformToVisual_Simple.png` - `ImageSourceUrlMsAppDataScheme.png-dark` - `ImageSourceUrlMsAppDataScheme.png` - `Ellipse.png-dark` - `Ellipse.png` - `FluentStyle_NavigationViewSample.png-dark` - `UIElement_InitializationSequence.png-dark` - `UIElement_InitializationSequence.png` - `ImageBrushInList.png-dark` - `ImageBrushInList.png` - `LargeImageList.png-dark`

* `skia-linux-screenshots`: **76** changed over 2190

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- `AutomationProperties_Name.png` - `ImageBrush_StreamSource.png-dark` - `ImageBrush_StreamSource.png` - `ImageBrush_UniformToFill.png-dark` - `ImageBrush_UniformToFill.png` - `BorderImageBrushRelativeTransform.png-dark` - `FluentStyle_NavigationViewSample.png-dark` - `FluentStyle_NavigationViewSample.png` - `ImageBrushInList.png-dark` - `ImageBrushInList.png` - `AutomationProperties_Name.png-dark` - `BorderImageBrushRelativeTransform.png` - `ImageBrushAlignmentXY.png-dark` - `ImageBrushAlignmentXY.png` - `ImageBrushAlignmentXY2.png-dark` - `ImageBrushAlignmentXY2.png` - `CalendarView_Theming.png-dark` - `DoubleImageBrushInList.png-dark` - `DoubleImageBrushInList.png` - `ImageWithLateSourceUniformToFill.png-dark`

* `skia-windows-screenshots`: **54** changed over 2190

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- `ImageSourceUrlMsAppDataScheme.png-dark` - `ImageSourceUrlMsAppDataScheme.png` - `BorderImageBrush.png-dark` - `ImageBrushInList.png-dark` - `ImageBrushInList.png` - `CalendarView_Theming.png-dark` - `Ellipse.png-dark` - `Ellipse.png` - `FluentStyle_NavigationViewSample.png-dark` - `FluentStyle_NavigationViewSample.png` - `ImagesInlineInFlipView.png-dark` - `ImagesInlineInFlipView.png` - `Image_Stretch_None_ScrollViewer.png-dark` - `Image_Stretch_None_ScrollViewer.png` - `BorderImageBrush.png` - `ImageBrush_Formats.png-dark` - `ImageBrush_Formats.png` - `CalendarView_Theming.png` - `ImageIconPage.png-dark` - `ImageIconPage.png`

* `wasm`: **660** changed over 1040

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- `MUXControlsTestApp.NavigationViewStretchPage` - `MUXControlsTestApp.RefreshContainerPage` - `SamplesApp.Microsoft_UI_Xaml_Controls.WebView2Tests.WebView2_AnchorNavigation` - `SamplesApp.Microsoft_UI_Xaml_Controls.WebView2Tests.WebView2_ChromeClient` - `SamplesApp.Wasm.Windows_UI_Xaml_Controls.ComboBox.ComboBox_IsSelected` - `SamplesApp.Wasm.Windows_UI_Xaml_Media.Transform.Grid_With_RotateTransform_And_Button` - `SamplesApp.Windows_UI_Xaml_Controls.ListView.ListViewContainerFromItem` - `SamplesApp.Windows_UI_Xaml_Controls.ListView.ListViewDynamicOrientation` - `SamplesApp.Windows_UI_Xaml_Shapes.PathTestsControl.FixedWidthUniform` - `SamplesApp.Windows_UI_Xaml_Shapes.PathTestsControl.HorizontalAlignmentStretchVerticalAlignmentBottom` - `UITests.Microsoft_UI_Xaml_Controls.ColorPickerTests.ColorPickerSample` - `UITests.Microsoft_UI_Xaml_Controls.WebView2Tests.WebView2_ExecuteScriptAsync` - `UITests.Microsoft_UI_Xaml_Controls.WebView2Tests.WebView2_NavigationProperties` - `UITests.Shared.Windows_Devices.Midi.MidiDeviceOutputTests` - `UITests.Shared.Windows_Globalization.Language_Properties` - `UITests.Shared.Windows_UI_Xaml.xBind.xBind` - `UITests.Shared.Windows_UI_Xaml.xBindTests.xBind_Field` - `UITests.Shared.Windows_UI_Xaml.xBindTests.xBind_Functions` - `UITests.Shared.Windows_UI_Xaml_Controls.ListView.ListView_Explicit_Items` - `UITests.Shared.Windows_UI_Xaml_Controls.TextBlockControl.TextBlock_Foreground_While_Collapsed`

* `wasm-automated-net7.0-UWP-Default-automated`: **124** changed over 1958

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- `Check_ListView_Swallows_Measure_after_scroll` - `Check_ListView_Swallows_Measure_before_scroll` - `FocusManager_GetFocusedElement_Grid_Validation_FocusManager_-_GetFocusedElement_-_Grid_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_Grid_Validation_FocusManager_-_GetFocusedElement_-_Grid_-_2_-_After_Selection` - `FocusManager_GetFocusedElement_Grid_Validation_Uno_UI_Samples_Content_UITests_FocusTests_FocusManager_GetFocus_Automated` - `FocusManager_GetFocusedElement_HyperlinkButton_LostFocus_Validation_FocusManager_-_LostFocus_-_HyperlinkButton_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_TextBlock_Validation_FocusManager_-_GetFocusedElement_-_TextBlock_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_TextBlock_Validation_FocusManager_-_GetFocusedElement_-_TextBlock_-_2_-_After_Selection` - `FocusManager_GetFocusedElement_TextBlock_Validation_Uno_UI_Samples_Content_UITests_FocusTests_FocusManager_GetFocus_Automated` - `FocusManager_GetFocusedElement_TextBoxMultiLine_LostFocus_Validation_FocusManager_-_LostFocus_-_TextBoxMultiLine_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_TextBoxMultiLine_Validation_Uno_UI_Samples_Content_UITests_FocusTests_FocusManager_GetFocus_Automated` - `FocusManager_GetFocusedElement_TextBoxSingleLine_LostFocus_Validation_FocusManager_-_LostFocus_-_TextBoxSingleLine_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_TextBoxSingleLine_LostFocus_Validation_FocusManager_-_LostFocus_-_TextBoxSingleLine_-_2_-_Click_outside` - `FocusManager_GetFocusedElement_TextBoxSingleLine_LostFocus_Validation_Uno_UI_Samples_Content_UITests_FocusTests_FocusManager_GetFocus_Automated` - `FocusManager_GetFocusedElement_ListViewItem_Validation_FocusManager_-_GetFocusedElement_-_ListViewItem_-_2_-_After_Selection` - `FocusManager_GetFocusedElement_ListViewItem_Validation_Uno_UI_Samples_Content_UITests_FocusTests_FocusManager_GetFocus_Automated` - `FocusManager_GetFocusedElement_Rectangle_Validation_FocusManager_-_GetFocusedElement_-_Rectangle_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_Rectangle_Validation_FocusManager_-_GetFocusedElement_-_Rectangle_-_2_-_After_Selection` - `FocusManager_GetFocusedElement_CheckBox_LostFocus_Validation_FocusManager_-_LostFocus_-_CheckBox_-_1_-_Initial_State` - `FocusManager_GetFocusedElement_CheckBox_LostFocus_Validation_FocusManager_-_LostFocus_-_CheckBox_-_3_-_Click_outside`

* `wasm-automated-net7.0-UWP-RuntimeTests-0`: **0** changed over 1 * `wasm-automated-net7.0-UWP-RuntimeTests-1`: **0** changed over 1 * `wasm-automated-net7.0-UWP-RuntimeTests-2`: **0** changed over 1 * `wasm-automated-net7.0-WinUI-Benchmarks-automated`: **0** changed over 1 * `wasm-automated-net7.0-WinUI-RuntimeTests-0`: **0** changed over 1 * `wasm-automated-net7.0-WinUI-RuntimeTests-1`: **0** changed over 1 * `wasm-automated-net7.0-WinUI-RuntimeTests-2`: **0** changed over 1