Enforce 90% patch coverage threshold on PRs

[arrayka]

• Does this PR have a descriptive title that could go in our release notes?
• Does this PR add any new dependencies?
• Does this PR modify any existing APIs?
• Is the change to the API backwards compatible?
• Should this result in any changes to our documentation, either updating existing docs or adding new ones?

Reference Issues/PRs

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.45%. Comparing base (205aad7) to head (81d007c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1084      +/-   ##
==========================================
- Coverage   89.46%   89.45%   -0.01%     
==========================================
  Files         459      459              
  Lines       85482    85482              
==========================================
- Hits        76475    76472       -3     
- Misses       9007     9010       +3     

Flag	Coverage Δ
miri	89.45% <ø> (-0.01%)	⬇️
unittests	89.08% <ø> (-0.01%)	⬇️

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see 1 file with indirect coverage changes

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