[ci] Run python-so-copying.yml on Linux and Mac both [WIP]

[johnkerl]

Issue and/or context: My current theory on TileDB-Inc/tiledbsoma-feedstock#95 and TileDB-Inc/tiledbsoma-feedstock#91 is that this code path, not being regression-tested on MacOS, is perhaps faulty on MacOS. Regardless, the logic which was developed on #1937 needs testing on MacOS, and it was an oversight on #1937 for us to have only tested on Linux.

See also #2210 for tracking.

See also #2219 for tracking.

Changes:

Notes for Reviewer:

[codecov]

Codecov Report

Merging #2208 (df00bac) into main (05cf351) will decrease coverage by 5.56%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2208      +/-   ##
==========================================
- Coverage   77.68%   72.13%   -5.56%     
==========================================
  Files         137      103      -34     
  Lines       10679     6875    -3804     
  Branches      214      215       +1     
==========================================
- Hits         8296     4959    -3337     
+ Misses       2297     1818     -479     
- Partials       86       98      +12     

Flag	Coverage Δ
libtiledbsoma	67.72% <ø> (+3.73%)	⬆️
python	?
r	74.69% <ø> (ø)

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

Components	Coverage Δ
python_api	∅ <ø> (∅)
libtiledbsoma	48.85% <ø> (+0.15%)	⬆️

[jdblischak]

Thanks for getting this started!

[jdblischak]

This is the tricky part. This needs to be a Docker image, not the name of the GitHub Actions runner.

The linux job runs inside of a Docker container (this made it easier for me to test locally). Thus it's not as easy as adding macos-12 to the build matrix. We need to either 1) make the container directive only apply to the ubuntu job (probably possible, but not immediately clear to me how), or 2) create a second job that runs similar code on macOS (which might be worth it given all the changes to accommodate running the same steps on linux and macOS)

[johnkerl]

@jdblischak I'm totally happy with well-documented code-duplication here.

[jdblischak]

I did find some workarounds to create a build matrix that builds natively on macOS but in Docker on Ubuntu. There is no if, so the key is to pass null to container for the macOS job. Overall the readability is not great though.

Also, I realized that we'll also need to download a different pre-built libtiledb binary for the macOS build, which makes the option to have a completely separate macOS build all the more appealing.