action: use multiple interpreters features from 'actions/setup-python@v4'

[mayeut]

The nox action can be simplified now that setup-python allows to setup multiple interpreters natively.

This also adds support for ~ version specifier (e.g. ~3.12.0-0) which mostly should not be necessary as setup-python now supports allow-prereleases which transforms 3.12 into ~3.12.0-0 when searching for CPython 3.12.
The ~ specifier might be interesting for those who want a minimum patch version, e.g. ~3.11.1 <=> >=3.11.1 <3.12.

[theacodes]

Awesome, thanks for doing this!