Tests

Fix is_overlapping_types for generic callables #21686

Job	Run time
Test mypyc suite with 32-bit Python	10m 38s
Test suite with py311-ubuntu	9m 7s
mypyc runtime tests with py313-macos	6m 30s
Parallel tests with py314-ubuntu, mypyc-compiled	26m 5s
Parallel tests with py314-ubuntu, interpreted	25m 43s
Test suite with py310-ubuntu, mypyc-compiled	16m 12s
mypyc runtime tests with py310-ubuntu	6m 26s
Test suite with py312-ubuntu	9m 34s
Test suite with py313-ubuntu, mypyc-compiled	15m 0s
Test suite with py314t-ubuntu, mypyc-compiled	17m 26s
Test suite with py314-windows-64	25m 57s
Parallel tests with py314-windows-64, interpreted	8m 21s
Test suite with py314-ubuntu, mypyc-compiled	15m 18s
Type check our own code (py310-ubuntu)	1m 45s
Formatting and code style with Black + ruff	1m 55s
Type check our own code (py310-windows-64)	2m 24s
	3h 18m 21s

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