fix: add support for importlib_metadata 6

[woile]

Description

Checklist

• Run ./scripts/format and ./scripts/test locally to ensure this change passes linter check and test
• Test the changes on the local machine manually

Expected behavior

Plugins should work normally

[codecov]

Codecov Report

Patch coverage: 76.92% and project coverage change: -0.10 ⚠️

Comparison is base (f04a719) 97.35% compared to head (3cfed6d) 97.26%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #734      +/-   ##
==========================================
- Coverage   97.35%   97.26%   -0.10%     
==========================================
  Files          42       42              
  Lines        2041     2045       +4     
==========================================
+ Hits         1987     1989       +2     
- Misses         54       56       +2     

Flag	Coverage Δ
unittests	97.26% <76.92%> (-0.10%)	⬇️

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Impacted Files	Coverage Δ
commitizen/commands/init.py	87.43% <0.00%> (ø)
commitizen/config/json_config.py	93.54% <66.66%> (-6.46%)	⬇️
commitizen/__init__.py	100.00% <100.00%> (ø)
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/bump.py	100.00% <100.00%> (ø)
commitizen/defaults.py	100.00% <100.00%> (ø)

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