Sanity check python package versions

[VRehnberg]

Sometimes the wrong package version may be installed, see easybuilders/easybuild-framework#4706 which introduces a fix for a known way this could happen.

To catch similar issues it would probably be good to sanity check the version of installed packages.

Some possibilities:

• Parse pip list --format=json or pip show %(name)s
  • Requires pip
• Run from pkg_resources import get_distribution; assert get_distribution(%(name)s).version == %(version)s
  • Requires setuptools
• Run import %(modulename)s; from importlib.metadata import version; assert version('%(modulename)s') == %(version)s
  • Requires Python>=3.8 or importlib_metadata
• Run import %(modulename)s; if hasattr(%(modulename)s, '__version__'): assert %(modulename)s.__version__ == %(version)s
  • Packages not defining __version__ will not be sanity checked