Better approach in 'unnecessary-list-index-lookup' to avoid crashes

[Pierre-Sassoulas]

Manual backport of #10511

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.84%. Comparing base (78444bb) to head (d320403).
⚠️ Report is 1 commits behind head on maintenance/3.3.x.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           maintenance/3.3.x   #10512      +/-   ##
=====================================================
- Coverage              95.85%   95.84%   -0.01%     
=====================================================
  Files                    174      174              
  Lines                  19025    19024       -1     
=====================================================
- Hits                   18236    18234       -2     
- Misses                   789      790       +1     

Files with missing lines	Coverage Δ
pylint/checkers/refactoring/refactoring_checker.py	98.06% <100.00%> (-0.11%)	⬇️

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