DM-35347: Switch to pyproject.toml

[mwittgen]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Merging #6 (7805f6a) into main (4ca1b9b) will not change coverage.
The diff coverage is n/a.

❗ Current head 7805f6a differs from pull request most recent head 5be261d. Consider uploading reports for the commit 5be261d to get more accurate results

@@           Coverage Diff           @@
##             main       #6   +/-   ##
=======================================
  Coverage   15.53%   15.53%           
=======================================
  Files           4        4           
  Lines        1294     1294           
  Branches      285      285           
=======================================
  Hits          201      201           
+ Misses       1091     1083    -8     
- Partials        2       10    +8     

Impacted Files	Coverage Δ
python/lsst/ctrl/bps/htcondor/lssthtc.py	18.11% <0.00%> (ø)
python/lsst/ctrl/bps/htcondor/htcondor_service.py	9.79% <0.00%> (ø)

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[timj]

Is pyproject.toml a supported option here? (now that we aren't using setup.cfg)

[mwittgen]

I am not sure this makes sense when using pyproject.toml and python-build. I would opt to remove cache-dependency-path

[timj]

I have no idea how clever the caching is. For all I knew it did understand the new pyproject.toml way of specifying dependencies but if it does not then there's no point keeping it around.

[timj]

Looks like you can ask it to cache from the requirements.txt instead. https://github.com/actions/setup-python#caching-packages-dependencies