Moved update-cov-report action to a separate file

[kozlov721]

Purpose

Makes the CI file less convoluted

Specification

None / not applicable

Dependencies & Potential Impact

None / not applicable

Deployment Plan

None / not applicable

Testing & Validation

None / not applicable

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.30%. Comparing base (64d29f7) to head (ecf49fe).
⚠️ Report is 6 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #361      +/-   ##
==========================================
+ Coverage   95.26%   95.30%   +0.04%     
==========================================
  Files         103      103              
  Lines        6333     6388      +55     
==========================================
+ Hits         6033     6088      +55     
  Misses        300      300              

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