Tests

Move PyPy check before mypy imports #19852

Job	Run time
Test mypyc suite with 32-bit Python	8m 32s
Test suite with py313-ubuntu, mypyc-compiled	15m 41s
Test suite with py314t-ubuntu, mypyc-compiled	16m 20s
Test suite with py314-ubuntu, mypyc-compiled	14m 17s
Test suite with py312-ubuntu	9m 52s
Test suite with py310-ubuntu, mypyc-compiled	14m 29s
Parallel tests with py314-ubuntu, interpreted	22m 0s
Test suite with py311-ubuntu	9m 7s
Type check our own code (py310-ubuntu)	1m 45s
Formatting and code style with Black + ruff	1m 55s
Test suite with py314-windows-64	27m 48s
mypyc runtime tests with py313-macos	4m 25s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 2s
mypyc runtime tests with py310-ubuntu	5m 1s
Type check our own code (py310-windows-64)	2m 34s
	3h 0m 48s

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