chore: fixes codecov exclusion wildcard syntax

[mathetake]

Description

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.32%. Comparing base (e33a5f3) to head (2045ed7).

❌ Your project status has failed because the head coverage (78.32%) is below the target coverage (86.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1086   +/-   ##
=======================================
  Coverage   78.32%   78.32%           
=======================================
  Files          82       82           
  Lines        9647     9647           
=======================================
  Hits         7556     7556           
  Misses       1728     1728           
  Partials      363      363           

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[mathetake]

hmm no idea on why recursive matching ignore doesn't take any effect on codecov. I see internal/testing/**/* in the ignore already on main branch vs I still can find these files on the UI which says they are not covered (https://app.codecov.io/gh/envoyproxy/ai-gateway?displayType=list&search=internal%2Ftesting). That's why the codecov bot gets angry about the project level coverage too low.

[mathetake]

HELP WANTED