fix(CI): Set ESLINT_USE_FLAT_CONFIG=false

[tvdeyen]

In ESLint v9 the flat config is default, but we can change the default back to the old one.

See: eslint/eslint#18287

[loicginoux]

ah it's a shame we both worked on the same issue, I just submitted another one but did the upgrade to new configuration expected by eslint 9.0.0... #5722. Let me know what you think

[tvdeyen]

@loicginoux no, no shame :) Your is better, because I just disabled the new config format, while you updated it.

Closing in favor of #5722

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.94%. Comparing base (a2e1519) to head (2d5296f).
Report is 11 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5721   +/-   ##
=======================================
  Coverage   88.94%   88.94%           
=======================================
  Files         702      702           
  Lines       16698    16698           
=======================================
  Hits        14852    14852           
  Misses       1846     1846           

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[tvdeyen]

@solidusio/core-team I reopened the PR because it solves the issue for now and #5722 seems to need more work.

[tvdeyen]

We need to backport this to all maintained Solidus version I guess. Which one are those?

[github-actions]

💚 All backports created successfully

Status	Branch	Result
✅	v4.3

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details