fix/revert 792

[d-v-b]

This PR partially reverts the changes in #792 by allowing either the old crc32c package or the google crc32c package to be used for the crc32c checksum. This will fix issues in zarr-python related to a missing crc32c import.

[codecov]

Codecov Report

❌ Patch coverage is 61.76471% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.68%. Comparing base (91dfe42) to head (1d922db).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
numcodecs/tests/test_checksum32.py	53.33%	7 Missing ⚠️
numcodecs/checksum32.py	68.42%	6 Missing ⚠️

❌ Your patch status has failed because the patch coverage (61.76%) is below the target coverage (100.00%). You can increase the patch coverage or adjust the target coverage.
❌ Your project status has failed because the head coverage (98.68%) is below the target coverage (100.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #802      +/-   ##
==========================================
+ Coverage   89.08%   98.68%   +9.60%     
==========================================
  Files          64       64              
  Lines        2574     2595      +21     
==========================================
+ Hits         2293     2561     +268     
+ Misses        281       34     -247     

Files with missing lines	Coverage Δ
numcodecs/checksum32.py	94.54% <68.42%> (+2.54%)	⬆️
numcodecs/tests/test_checksum32.py	93.33% <53.33%> (+9.29%)	⬆️

... and 7 files with indirect coverage changes

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[jhamman]

Thanks both for sorting out this solution.

[d-v-b]

thank you @maxrjones and @jhamman!