CI: Move Python 3.10 workflows to Posix Matrix File

[lithomas1]

We should move Python 3.10 workflows from the python-dev workflow to individual jobs.

The jobs we should add are: Azure 3.10 macOs, Azure 3.10 Windows, Posix jobs(actions-310-slow, actions-310, convert actions-39-numpydev to actions-310-numpydev). Finally, we should change the Python-Dev workflow to be testing the 3.11 alpha.

Feel free to edit if I'm missing any jobs.

[lithomas1]

This needs to be done to clear the way for Python 3.11 dev testing and for good coverage on Python 3.10.

[simonjayhawkins]

@lithomas1 is this blocking 1.4 release?

[lithomas1]

It's not blocking for the RC, but blocks the release. OP was a little outdated, so I updated it with what needs to be done.