feat(gh): full Linux arch support

[ethanholz]

This PR aims to support the entire set of Linux architectures as provided by actions/runner.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.21%. Comparing base (81c4f29) to head (4cd1a15).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #12      +/-   ##
==========================================
+ Coverage   94.11%   94.21%   +0.10%     
==========================================
  Files           3        3              
  Lines         289      294       +5     
==========================================
+ Hits          272      277       +5     
  Misses         17       17              

Flag	Coverage Δ
unittests	94.21% <100.00%> (+0.10%)	⬆️

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[dwhswenson]

Minor changes for what I see as the more standard format for error messages in Python (follow practices in standard library): namely, single-quotes around values.

(I'm not always perfect at remembering to do this, myself, but I do think it makes the messages more readable.)

[ethanholz]

@dwhswenson this is ready to merge whenever you are.

[dwhswenson]

Merged in main in order to get CodeCov updates, and then forgot to finish the merge here! Merging now.