pylint: Fix linter issues related to pylint>=4.0.0

[oreiche]

test_ui.py:
Fix name style for function constants, which are deliberately not
considered constants anymore.

apport-valgrind:
Remove contradicting control messages, which also triggers a false
positive "useless-suppression" warning.

kernel_oops:
Remove invalid-name suppression, as the new pylint now correctly
identifies those variables not to be constants.

test_signal_crashes.py and test_recoverable_problem.py:
Remove Useless suppression of 'inconsistent-return-statements'
(issue since pylint>=4.0.5)

test_hookutils.py:
Remove useless suppression of 'line-too-long'
(general issue)

CI: Bump linter container to resolute

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.41%. Comparing base (5fe5468) to head (0f6c20f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #565      +/-   ##
==========================================
- Coverage   84.42%   84.41%   -0.01%     
==========================================
  Files         104      104              
  Lines       20901    20901              
  Branches     3265     3265              
==========================================
- Hits        17645    17644       -1     
  Misses       2817     2817              
- Partials      439      440       +1     

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