The module loading code was updated to use a supported Python library instead of an older deprecated one. This helps keep Odoo compatible with newer Python versions while preserving existing add-ons behavior.

[PEP 574] is going to depreciate the `imp` standard module in PY3.8,
the `importlib` module a substitute module.

[PEP 594]: https://www.python.org/dev/peps/pep-0594/#imp

Was #35929