Update delete_backport_branch workflow to include release-chores branches

[RileyJergerAmazon]

This PR updates the delete_backport_branch workflow to automatically delete branches that start with 'release-chores/' after they are merged, in addition to the existing condition for 'backport/' branches.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.04%. Comparing base (7ea7885) to head (0683fbb).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1462      +/-   ##
==========================================
- Coverage   76.18%   76.04%   -0.15%     
==========================================
  Files         375      375              
  Lines       18772    18772              
  Branches     2366     2366              
==========================================
- Hits        14302    14275      -27     
- Misses       3233     3237       +4     
- Partials     1237     1260      +23     

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