feat: allow disabling caches with --no-cache option or PDM_NO_CACHE

[frostming]

Signed-off-by: Frost Ming [email protected]

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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.83%. Comparing base (6823199) to head (e0eef64).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2702      +/-   ##
==========================================
+ Coverage   84.81%   84.83%   +0.01%     
==========================================
  Files         104      104              
  Lines       10316    10326      +10     
  Branches     2239     2242       +3     
==========================================
+ Hits         8750     8760      +10     
  Misses       1096     1096              
  Partials      470      470              

Flag	Coverage Δ
unittests	84.62% <100.00%> (+0.01%)	⬆️

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