build/pkgs/cbc 2.10.11, sage_numerical_backends_coin

[mkoeppe]

• Our cbc package is ancient and fails to build on various platforms
• the current sage_numerical_backends_coin package has not been updated for Cython 3
• current cbc tarballs no longer seem to contain dependencies such as Clp.

Switching cbc to install via coinbrew.

📝 Checklist

• The title is concise and informative.
• 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 and checked the documentation preview.

⌛ Dependencies

• Depends on build/pkgs/sage_numerical_backends_coin, sage_numerical_backends_cplex, sage_numerical_backends_gurobi: Update to 10.4 (includes fix for Cython 3) #38319

[github-actions]

Documentation preview for this PR (built with commit 5516158; changes) is ready! 🎉
This preview will update shortly after each push to this PR.

[mkoeppe]

@culler Here is a tentative fix for sage_numerical_backends_coin, but on my macOS machine I'm getting segfaults in the Sage test suite when it is installed. I'll check what it looks like on the other platforms here in the CI.

[culler]

Wow. That does much more than add a few noexcept qualifiers. It adds yet another build system, with its own spkg! I see that lots of jobs were killed due to abort, but I don't see a stack trace.

[mkoeppe]

Yes... Unfortunately our ancient version of cbc fails to build on many platforms, including the "manylinux" wheel building environment that I'm trying to set up. Hence the upgrade. But it looks like this won't be ready for 10.4.