[3.11] gh-105834: Backport new tests for `typing.Protocol` (#105835)#105860

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JelleZijlstra merged 2 commits intopython:3.11from AlexWaygood:backport-105835-311

Jun 16, 2023

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Commits on Jun 16, 2023

[3.11] pythongh-105834 : Add tests for calling issubclass() between two protocols (python#105835 )
AlexWaygood
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Add missing import
AlexWaygood
committed