Add python 3.14 and 3.14t

[mattip]

We could add the newer pythons, or archive this repo. I don't know if anyone is using these images anymore. Focal (Ubuntu 20.04) standard support has ended, and I don't think it is worth updating this repo to 24.04 now that cibuildwheel is much more popular than multibuild.

[radarhere]

https://hub.docker.com/_/ubuntu has dropped focal, so I don't think the Docker images can continue building as they are.

[mattip]

I guess we could start a new branch with noble (24.04)

[mattip]

But it is so easy to simply run ubuntu-latest in github CI, perhaps no-one should be using this anymore.

[radarhere]

I've created #54 if you are interested in Ubuntu 24.04.

[mattip]

If anyone is running into this, please comment here so we will know we still need to support these images moving forward.

[jswhit]

I'm running into this trying to build 3.14 wheels for pygrib, a failed run can be seen at https://github.com/jswhit/pygrib-wheels/actions/runs/18729876372

[mattip]

The new images are available on https://hub.docker.com/u/multibuild. They have the noble name, so DOCKER_TEST_IMAGE=multibuild/noble_$PLAT should now work.

[mattip]

I think we should change the multibuild defaults to alpine_3.22 and noble.

[mattip]

see multi-build/multibuild#552. Closing.