Test PROCESS on `3.10` and `3.11`

[timothy-nunn]

Contingent on #3200

#3200 changes the lowest Python version PROCESS supports to 3.10. As a result, the PROCESS CI now runs on 3.10. It would be nice to run the PROCESS CI on both versions of Python that we support (3.10 and 3.11). #3200 further supports this by removing our dependence on Docker containers, all dependencies are now installed in the various CI jobs.

Testing both versions should utilise GitHub actions matrixing. It is unclear how this will work with passing compiled assets between jobs, possibly by naming the assets based upon their version?