Tests

Fix descriptor access for complex generics #22316

Job	Run time
Test suite with py312-ubuntu	10m 1s
Test mypyc suite with 32-bit Python	10m 41s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 56s
Test suite with py314-windows-64	31m 37s
Test suite with py315-ubuntu, mypyc-compiled	16m 10s
mypyc runtime tests with py313-macos	7m 6s
Test suite with py314t-ubuntu, mypyc-compiled	18m 6s
Test suite with py313-ubuntu, mypyc-compiled	15m 31s
mypyc runtime tests with py310-ubuntu	7m 13s
Test suite with py310-ubuntu, mypyc-compiled	16m 39s
Parallel tests with py314-ubuntu, interpreted	26m 29s
Test suite with py314-ubuntu, mypyc-compiled	16m 13s
Type check our own code (py310-ubuntu)	1m 3s
Type check our own code (py310-windows-64)	1m 55s
Formatting and code style with Black + ruff	1m 53s
Test suite with py311-ubuntu	9m 59s
Parallel tests with py314-windows-64, interpreted	11m 20s
	3h 50m 52s

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