tests: migrate the pytype test to a shell script for easier CI processing
There have been recent hangs and timeout, but it's hard to debug because the *.t
test redirects output to a file and only prints it if `pytype` actually exits.
This shell script can be run directly by CI, and will allow more flexibility to
try to cache and restore type stubs for further speed increases.
Our full contribution guidelines are in our wiki, please see:
https://www.mercurial-scm.org/wiki/ContributingChanges
If you just want a checklist to follow, you can go straight to
https://www.mercurial-scm.org/wiki/ContributingChanges#Submission_checklist
If you can't run the entire testsuite for some reason (it can be
difficult on Windows), please at least run `contrib/check-code.py` on
any files you've modified and run `python contrib/check-commit` on any
commits you've made (for example, `python contrib/check-commit
273ce12ad8f1` will report some style violations on a very old commit).