Handle typing.Generic case in MRO #2693

Job	Run time
unit_tests (pypy-3.9, ubuntu-latest)	5m 15s
unit_tests (pypy-3.9, windows-latest)	10m 17s
unit_tests (pypy-3.9, macos-latest)	5m 16s
unit_tests (pypy-3.10, ubuntu-latest)	4m 58s
unit_tests (pypy-3.10, windows-latest)	7m 51s
unit_tests (pypy-3.10, macos-latest)	4m 49s
unit_tests (3.9, ubuntu-latest)	1m 56s
unit_tests (3.9, windows-latest)	2m 48s
unit_tests (3.9, macos-latest)	1m 40s
unit_tests (3.10, ubuntu-latest)	1m 51s
unit_tests (3.10, windows-latest)	3m 20s
unit_tests (3.10, macos-latest)	2m 1s
unit_tests (3.11, ubuntu-latest)	1m 49s
unit_tests (3.11, windows-latest)	3m 46s
unit_tests (3.11, macos-latest)	1m 36s
unit_tests (3.12, ubuntu-latest)	2m 26s
unit_tests (3.12, windows-latest)	3m 59s
unit_tests (3.12, macos-latest)	1m 26s
unit_tests (3.13, ubuntu-latest)	2m 29s
unit_tests (3.13, windows-latest)	4m 23s
unit_tests (3.13, macos-latest)	1m 56s
GHA Required	2s
release	10s
	1h 16m 4s

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