[github-actions] Split Windows/MacOS workflows

[xmkg]

The workflows are split for better organization, control, and clarity.

Description

• What does this PR do?
  Splits the Windows macOS workflow into macOS and Windows.
• Why is this change needed?
  To remove the need for if this and that checks, and have more granular control over workflows

This PR splits the workflows. No additional code is being introduced.

MULTI-2534

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.54%. Comparing base (5c542eb) to head (631aab5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4810   +/-   ##
=======================================
  Coverage   87.54%   87.54%           
=======================================
  Files         258      258           
  Lines       14152    14152           
=======================================
  Hits        12388    12388           
  Misses       1764     1764           

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