`setuptools` `pkg_resources` deprecation warning and December removal

[ABruihler]

As of setuptools==80.9.0, when importing napalm, the following warning is shown about pkg_resources being deprecated and slated for removal in December:

Python 3.12.10 (main, Apr  9 2025, 03:49:38) [Clang 20.1.0 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import napalm
/Users/me/dir/.venv/lib/python3.12/site-packages/napalm/__init__.py:1: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
  import pkg_resources

The referenced setuptools link includes more details (emphasis mine):

Use of pkg_resources is deprecated in favor of importlib.resources, importlib.metadata and their backports (importlib_resources, importlib_metadata). Some useful APIs are also provided by packaging (e.g. requirements and version parsing). Users should refrain from new usage of pkg_resources and should work to port to importlib-based solutions.

setuptools issue #3085 and draft PR #5007 have some additional discussion.

In our project we have pinned setuptools<80.9.0 to avoid the warning for now.