Add comparison with Python 3.10

[97littleleaf11]

There are slightly performance differences between python versions. It's a good idea to compare mypyc with 3.10 or even 3.11-dev.

[JukkaL]

In my experience, building 3.10 ourselves (or using an unofficial build) tends to result in worse performance than when using the Python shipped with Ubuntu. I think that the best option would be to upgrade to Ubuntu 22.04 which includes Python 3.10.

There are some extra steps required to allow using old recorded timings without a discontinuity after the Ubuntu and Python version upgrade.

[JukkaL]

By now we should be comparing against 3.11, which has some nice performance improvements.

[JukkaL]

We are now comparing against 3.13.