Fix sorting case sensitivity in list command (#1973)

[dbalabka]

Pull Request Checklist

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

Fixed #1973

[frostming]

@dbalabka Can you fix the failing tests?

[dbalabka]

@frostming, yes sure. I'm in progress

[frostming]

You fix makes sense but it seems can't work with the test suite due to the mocking.

I will remove the test change and merge.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.03 ⚠️

Comparison is base (16a137f) 85.24% compared to head (013c288) 85.22%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1974      +/-   ##
==========================================
- Coverage   85.24%   85.22%   -0.03%     
==========================================
  Files          99       99              
  Lines        9367     9367              
  Branches     2042     2042              
==========================================
- Hits         7985     7983       -2     
- Misses        937      939       +2     
  Partials      445      445              

Flag	Coverage Δ
unittests	85.02% <100.00%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pdm/cli/commands/list.py	91.42% <100.00%> (ø)

... and 1 file with indirect coverage changes

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