feat: add an ephemeral wheel cache in process

[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.

Close #1869

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02 🎉

Comparison is base (d714311) 85.41% compared to head (8720963) 85.43%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1885      +/-   ##
==========================================
+ Coverage   85.41%   85.43%   +0.02%     
==========================================
  Files          99       99              
  Lines        9085     9098      +13     
  Branches     1962     1963       +1     
==========================================
+ Hits         7760     7773      +13     
  Misses        895      895              
  Partials      430      430              

Flag	Coverage Δ
unittests	85.24% <100.00%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
src/pdm/models/caches.py	88.48% <100.00%> (+0.91%)	⬆️
src/pdm/models/candidates.py	87.16% <100.00%> (-0.04%)	⬇️
src/pdm/project/core.py	90.62% <100.00%> (ø)

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