ci: use extends instead of <<: *x The old form is a yaml construct that make it hard to share variable definition. The "extends:" key is a gitlab specific that preserve the variable definition and just add the new ones. This will help us to reduce duplication. This has the effect of fixing some of variants definition we though we set while we did actually not. Most notably, the "rust" variant for 3.12 and 3.13 seems fully broken in the CI (possibly because some rust-cpython version issue?). This changeset only reveal such breackage and does not introduce them.

ci: use the macos wheel to run tests

wheel: build mac os wheel through the CI Let's start building wheel for mac os X too.

pycompat: drop some now useless workaround for makedirs This `exists_ok` flag was added in Python 3.2

run-tests: install wheel using --prefix instead of --user --user does not work if a venv is enabled when calling run-tests.py

ci: automatically compute the python tag we use to identify tag This make the determination more automatic and less error prone. In addition, this will make it possible to run on a runner without a pre-determined Python version, like what we do for the macos and windows workers.

pytype: add relative timestamp to the output if `ts` is available This should help to identify the module that are the slower to analyze.