Tests

Avoid widening incompatible ParamSpec constraints #22100

Job	Run time
Test mypyc suite with 32-bit Python	10m 39s
Parallel tests with py314-ubuntu, interpreted	23m 41s
Test suite with py314t-ubuntu, mypyc-compiled	17m 19s
Test suite with py311-ubuntu	9m 11s
mypyc runtime tests with py310-ubuntu	7m 2s
Test suite with py314-ubuntu, mypyc-compiled	16m 0s
Test suite with py312-ubuntu	10m 17s
Test suite with py310-ubuntu, mypyc-compiled	16m 1s
Test suite with py313-ubuntu, mypyc-compiled	16m 12s
mypyc runtime tests with py313-macos	6m 6s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 18s
Parallel tests with py314-windows-64, interpreted	11m 47s
Type check our own code (py310-ubuntu)	1m 9s
Test suite with py314-windows-64	29m 12s
Type check our own code (py310-windows-64)	2m 3s
Formatting and code style with Black + ruff	1m 55s
	3h 25m 52s

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