feat: add option to set zip compression level

[oraluben]

Add --zip-compression-level and AUDITWHEEL_ZIP_COMPRESSION_LEVEL env to specify zip compression level.

This PR do not change the default level.

Part of #545.
As in #545 (comment), we don't want to alter the default compress level. However I do want to add this argument to have the ability to change it.

I'm not very sure about the best place to add test for this.

[codecov]

Codecov Report

Attention: Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.11%. Comparing base (b01e842) to head (a08481f).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/auditwheel/tools.py	95.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #547      +/-   ##
==========================================
+ Coverage   92.07%   92.11%   +0.03%     
==========================================
  Files          22       22              
  Lines        1553     1572      +19     
  Branches      285      286       +1     
==========================================
+ Hits         1430     1448      +18     
  Misses         74       74              
- Partials       49       50       +1     

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[mayeut]

Thanks @oraluben