Readd pylint on CI

[cooperlees]

• pylint supports 3.11 so lets test it again
• Lets pull in latest default config + relint everything
• Lots and lots of fixes

Testing

Make unittests pass locally ...

• /tmp/tp/bin/coverage run ptr_tests.py

Run ptr on itself

• /tmp/tp/bin/ptr --print-cov --run-disabled -k