Suggestion: run import on all python modules with a __init__.py

[akesandgren]

When installing a pythonpackage/bundle we could got through the installed modules and for everything that has a __init__.py we could run "import xxx" to verify that it has all things it depends on.

This could be done in a python loop which has exception handling for failed loads and prints which modules fail and why.
I.e. instead of setting up one test env for each module, do them all in one swoop.

[akesandgren]

This would have caught the problem with Cython 0.29.37 with Python 3.12 where pyximport imports imp which was deleted in Python 3.12, see easybuilders/easybuild-easyconfigs#26082

[boegel]

I think this could be a good idea, but Installations of Python packages don't always include __init__.py files though...

[akesandgren]

No, but I'm just trying to make sure we test some modules that gets installed without being explicitly tested due to being in exts_list
If they don't have a init.py you may not be able to do import on them I think hence only targeting init.py ones