pkgs/sagemath-{bliss,coxeter3,...}: Move metadata from setup.cfg to pyproject.toml

[mkoeppe]

• Part of Migrate from setup.cfg to pyproject.toml #33577

📝 Checklist

• The title is concise, informative, and self-explanatory.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

• Depends on pkgs/sagemath-{objects,categories,environment,repl}: Move metadata from setup.cfg to pyproject.toml #36563

[kiwifb]

Hum, consequence of removing it from sage_setup. Fair enough. I thought I had reviewed this one already. I guess those PR got mixed up in my head.

[mkoeppe]

I think we should put this commit on #36562 instead

[kiwifb]

LEt's get this in already. Thought it was done long ago.

[mkoeppe]

Thank you!

[kiwifb]

We will have to visit the MANIFEST.in again. I noticed a number of sdist includes .m4 files(sagemath-bliss, sagemath-standard for example) and some do include .gitignore (sagemath-standard for example).

[mkoeppe]

We can do that as part of #36649

[kiwifb]

We can do that as part of #36649

Are you sure that's the right ticket?

[github-actions]

Documentation preview for this PR (built with commit bd825f0; changes) is ready! 🎉