fix: Added Fluent override for the NativeTemplate to avoid seeing material styles for the native tab by default

[agneszitte]

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the current behavior?

Android/iOS (DatePicker - Native Tab) For the native tab, the DatePicker button is using Material style instead of Fluent by default

What is the new behavior?

Added Fluent override for the NativeTemplate to avoid seeing material styles for the native tab by default

PR Checklist

Please check if your PR fulfills the following requirements:

• [X] Tested on iOS.
• [X] Tested on Wasm.
• [X] Tested on Android.
• [X] Tested on UWP.
• [X] Tested in both Light and Dark themes.
• [ ] Associated with an issue (GitHub or internal)

[kazo0]

/azp run

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