Clear LRU caches on pylint utilities

[jacobtylerwalls]

Type of Changes

	Type
✓	🐛 Bug fix

Description

Closes #8361

Created a new backport label (should I have?)

[DanielNoord]

I'll let Pierre say something about the backporting

[codecov]

Codecov Report

Merging #8420 (f8206be) into main (2b3d113) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8420   +/-   ##
=======================================
  Coverage   95.71%   95.72%           
=======================================
  Files         175      175           
  Lines       18451    18462   +11     
=======================================
+ Hits        17660    17672   +12     
+ Misses        791      790    -1     

Impacted Files	Coverage Δ
pylint/checkers/utils.py	96.02% <100.00%> (+0.01%)	⬆️
pylint/lint/run.py	86.56% <100.00%> (+0.20%)	⬆️

... and 3 files with indirect coverage changes

[Pierre-Sassoulas]

LGTM ! Thanks for creating the label, when we release we change the one already backported one to "backported" and we could rename to old one or delete the old one / create the new one. I was in the process of doing just that and thought I should upgrade the release.md but then apparently got distracted by a squirrel 😄 I realize now that I did not clean up readthedoc versions either, so this was a fruitful review.

[github-actions]

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit f8206be