Remove deprecated pkg_resources library

[marmarta]

Use the recommended replacement: importlib. Requires at least Python 3.8 to work with importlib.metadata.

references https://github.com/QubesOS/qubes-issues/issues/9195

[marmarta]

PipelineRetryFailed

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 74.60%. Comparing base (e54eb38) to head (9e8d0c5). Report is 16 commits behind head on main.

Files	Patch %	Lines
qubesadmin/utils.py	0.00%	2 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #288      +/-   ##
==========================================
- Coverage   75.04%   74.60%   -0.45%     
==========================================
  Files          51       51              
  Lines        7839     7899      +60     
==========================================
+ Hits         5883     5893      +10     
- Misses       1956     2006      +50     

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