Consider updates to UI design for helper text on run/debug configuration window

[TrevCraw]

Currently, we provide a tooltip when hovering on labels in the configuration window. This is not intuitive. Users will typically hover over the input/selection boxes and not over the associated labels.

• [ ] Consider if the helper text that is currently a tooltip for "Start parameters" should remain a tooltip or should be placeholder text inside the input box.
• [ ] If keeping the "Start parameters" helper text as a tooltip, it should pop up when hovering over the input box and not the label.
• [ ] Consider if the helper text that is currently a tooltip for "Liberty project" should remain a tooltip or should be moved to be always visible greyed out text below the selection box, like the text below the "Start parameters" input box.
• [ ] If keeping the "Liberty project" helper text as a tooltip, it should pop up when hovering over the selection box and not the label.
• [ ] Refer to Gradle or other JetBrains run/debug config forms for other ideas. The Gradle config has interesting behaviour where the helper text below changes when a user hovers over the input box.

https://github.com/OpenLiberty/liberty-tools-intellij/assets/5885743/6697cd33-78c6-434a-8a71-075315dd260d

[anusreelakshmi934]

We can add a Placeholder in the Text box using - editParam.setPlaceholder("Hello"); editParam.setShowPlaceholderWhenFocused(true); in the method LibertyRunSettingsEditor in LibertyRunSettingsEditor.java Adding an image for reference: