[Backport maintenance/3.0.x] Avoid duplicate inference results for Tuple[Optional[int], ...]

[github-actions]

Backport dc13d5b from #2340.

[codecov]

Codecov Report

Merging #2342 (eeadffc) into maintenance/3.0.x (958ce1e) will increase coverage by 0.00%.
Report is 5 commits behind head on maintenance/3.0.x.
The diff coverage is 100.00%.

Additional details and impacted files

@@                Coverage Diff                 @@
##           maintenance/3.0.x    #2342   +/-   ##
==================================================
  Coverage              92.85%   92.86%           
==================================================
  Files                     94       94           
  Lines                  11056    11068   +12     
==================================================
+ Hits                   10266    10278   +12     
  Misses                   790      790           

Flag	Coverage Δ
linux	92.67% <100.00%> (+<0.01%)	⬆️
pypy	91.00% <92.30%> (+<0.01%)	⬆️
windows	92.45% <100.00%> (+<0.01%)	⬆️

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Files	Coverage Δ
astroid/__pkginfo__.py	100.00% <100.00%> (ø)
astroid/brain/brain_typing.py	87.17% <100.00%> (+0.16%)	⬆️
astroid/const.py	100.00% <100.00%> (ø)
astroid/nodes/node_classes.py	94.83% <100.00%> (+0.01%)	⬆️
astroid/protocols.py	90.28% <100.00%> (+0.06%)	⬆️