feat(floating-ui): add feature flag for dynamic floating-ui styles

[annawen1]

Closes #17018

This PR introduces a new feature flag (enable-v12-dynamic-floating-styles) to separate the @floating-ui logic. By turning on the flag, components will have dynamically positioned floating styles without the collision detection currently in place.

To have the collision detect logic, adopter will set the autoAlign prop to true which will automatically include the dynamic styling - so the feature flag is not necessary in this case.

Changelog

New

• enable-v12-dynamic-floating-styles feature flag

Changed

• add checks in current components utilitizing @floating-ui to separate out the style and middleware logic

Testing / Reviewing

• go to deploy preview, Feature flags section
• go to Dynamic floating styles folder and inspect the components and see that the styles are set dynamically

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[emyarod]

looks good to me!

[codecov]

Codecov Report

Attention: Patch coverage is 75.92593% with 13 lines in your changes missing coverage. Please review.

Project coverage is 78.99%. Comparing base (a71040f) to head (05e81f3).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/react/src/components/OverflowMenu/next/index.tsx	33.33%	5 Missing and 1 partial ⚠️
...s/react/src/components/MultiSelect/MultiSelect.tsx	57.14%	2 Missing and 1 partial ⚠️
...ackages/react/src/components/ComboBox/ComboBox.tsx	66.66%	1 Missing and 1 partial ⚠️
...ackages/react/src/components/Dropdown/Dropdown.tsx	75.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17727      +/-   ##
==========================================
- Coverage   79.00%   78.99%   -0.01%     
==========================================
  Files         408      408              
  Lines       14009    14032      +23     
  Branches     4320     4338      +18     
==========================================
+ Hits        11068    11085      +17     
- Misses       2775     2782       +7     
+ Partials      166      165       -1     

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