tools: enable linter in test/fixtures/test-runner/output

[aduh95]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.24%. Comparing base (0d91070) to head (7cb51f6).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #57698      +/-   ##
==========================================
+ Coverage   90.23%   90.24%   +0.01%     
==========================================
  Files         630      630              
  Lines      185055   185073      +18     
  Branches    36223    36222       -1     
==========================================
+ Hits       166980   167016      +36     
  Misses      11033    11033              
+ Partials     7042     7024      -18     

see 18 files with indirect coverage changes

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