Handle typing.Generic case in MRO #2766

Job	Run time
unit_tests (pypy-3.9, ubuntu-latest)	4m 25s
unit_tests (pypy-3.9, windows-latest)	7m 37s
unit_tests (pypy-3.9, macos-latest)	4m 15s
unit_tests (pypy-3.10, ubuntu-latest)	4m 23s
unit_tests (pypy-3.10, windows-latest)	8m 11s
unit_tests (pypy-3.10, macos-latest)	4m 12s
unit_tests (3.9, ubuntu-latest)	1m 43s
unit_tests (3.9, windows-latest)	3m 29s
unit_tests (3.9, macos-latest)	2m 2s
unit_tests (3.10, ubuntu-latest)	1m 39s
unit_tests (3.10, windows-latest)	2m 47s
unit_tests (3.10, macos-latest)	1m 57s
unit_tests (3.11, ubuntu-latest)	1m 37s
unit_tests (3.11, windows-latest)	3m 23s
unit_tests (3.11, macos-latest)	1m 32s
unit_tests (3.12, ubuntu-latest)	1m 58s
unit_tests (3.12, windows-latest)	3m 49s
unit_tests (3.12, macos-latest)	2m 17s
unit_tests (3.13, ubuntu-latest)	1m 58s
unit_tests (3.13, windows-latest)	3m 46s
unit_tests (3.13, macos-latest)	1m 47s
GHA Required	1s
release	6s
	1h 8m 54s

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