Start running PyPy 3.11 in CI

[A5rocks]

This is technically a "beta" version of PyPy but they say they'll drop 3.10 in the next release so it's better to make sure we support it.

[jakkdl]

Can also add it to the envlist in tox.ini

[CoolCat467]

Cache issue again, deleted windows caches so hopefully this next CI run will not have the cache issue

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00000%. Comparing base (ea03051) to head (e89a23e).
⚠️ Report is 49 commits behind head on main.

Additional details and impacted files

@@               Coverage Diff               @@
##                 main        #3282   +/-   ##
===============================================
  Coverage   100.00000%   100.00000%           
===============================================
  Files             127          127           
  Lines           19266        19266           
  Branches         1301         1301           
===============================================
  Hits            19266        19266           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[CoolCat467]

Ubuntu failures are from I think another cache issue, this time with apt-get instead of pip

[A5rocks]

I think the Ubuntu failures are simply a transient error due to a mirror being down?

[A5rocks]

OK I actually get it now, it's that presumably some of the GitHub Action runners have run apt update recently and some haven't. Turns out I just had to rerun it 7 times to luck into getting a good runner.