[Backport maintenance/3.3.x] Avoid importing submodules sharing names with standard library modules

[github-actions]

Backport 9f8faeb from #2702.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@                 Coverage Diff                  @@
##             maintenance/3.3.x    #2703   +/-   ##
====================================================
  Coverage                     ?   93.03%           
====================================================
  Files                        ?       93           
  Lines                        ?    11076           
  Branches                     ?        0           
====================================================
  Hits                         ?    10305           
  Misses                       ?      771           
  Partials                     ?        0           

Flag	Coverage Δ
linux	92.91% <100.00%> (?)
pypy	93.03% <100.00%> (?)
windows	93.02% <100.00%> (?)

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Files with missing lines	Coverage Δ
astroid/interpreter/_import/spec.py	97.10% <100.00%> (ø)

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