[ Fluent ] Fix DatePicker Style

[dipeshmsft]

Description

This is a subissue to track the progress of DatePicker Style fix.

Here are the broad categories of tasks that need to be done for this:

1. Match resource usage in control styles with WinUI resources where possible
2. Add animations for controls where required to match WinUI.
3. Compare Fluent styles with Aero2 styles to match
   3.a. Properties like HorizontalAlignment, VerticalAlignment
   3.b. TemplateBinding comparison with Aero2 styles
4. Compare WPF Fluent styles with WinUI styles :
   4.a. Convert ControlTemplate Triggers to VisualStates ( to simplify animation's and bring parity with WinUI styles )
   4.b. Convert StaticResource's to DynamicResource for properties where customization is needed.
   4.c. Define resources for CornerRadius, Thickness, etc. for the controls where it is needed

Links of related open DatePicker Issues

• Fluent v2: DatePicker Issues #10341

Important Questions :

There is an inherent difference between the DatePicker in WPF and CalendarDatePicker in WinUI.

• In WPF's DatePicker, we have several components like, DatePickerTextBox, Button which are not presentin CalendarDatePicker in WinUI, which behaves as a single button ( roughly ).