chore: Trigger required workflows on merge_group event

[abdhalees]

Description of changes:

to enable merge queue feature in the repo, trigger workflows that are checked in PR when merge queue is requested.

https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-a-merge-queue#triggering-merge-group-checks-with-github-actions

tested in global-styles repo: cloudscape-design/global-styles#48

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.53%. Comparing base (415108b) to head (2a112e8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #69   +/-   ##
=======================================
  Coverage   95.53%   95.53%           
=======================================
  Files           6        6           
  Lines         269      269           
  Branches       59       59           
=======================================
  Hits          257      257           
  Misses         12       12           

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