Add test for generic aliases and lenient_issubclass

[daviskirk]

Change Summary

Closes #2399

handle generic aliases (list[str], tuple[str, ...] and so on) in lenient_issubclass.

Related issue number

#2399

Checklist

• Unit tests for the changes exist
• Tests pass on CI and coverage remains at 100%
• Documentation reflects the changes where applicable
• changes/<pull request or issue id>-<github username>.md file added describing change
  (see changes/README.md for details)

[codecov]

Codecov Report

Merging #2392 (a463d42) into master (c8883e3) will decrease coverage by 0.53%.
The diff coverage is 70.00%.

@@            Coverage Diff             @@
##           master    #2392      +/-   ##
==========================================
- Coverage   99.90%   99.36%   -0.54%     
==========================================
  Files          25       25              
  Lines        5039     5047       +8     
  Branches     1031     1032       +1     
==========================================
- Hits         5034     5015      -19     
- Misses          1        9       +8     
- Partials        4       23      +19     

Impacted Files	Coverage Δ
pydantic/typing.py	100.00% <ø> (ø)
pydantic/utils.py	98.29% <50.00%> (-1.71%)	⬇️
pydantic/json.py	100.00% <100.00%> (ø)
pydantic/annotated_types.py	83.33% <0.00%> (-16.67%)	⬇️
pydantic/mypy.py	95.50% <0.00%> (-4.50%)	⬇️
pydantic/env_settings.py	99.20% <0.00%> (-0.80%)	⬇️
pydantic/decorator.py	99.42% <0.00%> (-0.58%)	⬇️
pydantic/fields.py	99.58% <0.00%> (-0.42%)	⬇️

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[samuelcolvin]

great, thank you.