Tests

Initial support for Python 3.15.0a8 #21785

Job	Run time
Test mypyc suite with 32-bit Python	9m 57s
Test suite with py310-ubuntu, mypyc-compiled	16m 22s
Test suite with py314t-ubuntu, mypyc-compiled	16m 47s
Test suite with py312-ubuntu	9m 40s
Test suite with py314-ubuntu, mypyc-compiled	14m 57s
Test suite with py311-ubuntu	9m 5s
Test suite with py313-ubuntu, mypyc-compiled	15m 58s
mypyc runtime tests with py310-ubuntu	6m 37s
Parallel tests with py314-windows-64, interpreted	10m 14s
mypyc runtime tests with py313-macos	6m 36s
Type check our own code (py310-ubuntu)	1m 11s
Formatting and code style with Black + ruff	1m 59s
Type check our own code (py310-windows-64)	1m 47s
Parallel tests with py314-ubuntu, interpreted	23m 3s
Test suite with py314-windows-64	21m 56s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 18s
	3h 13m 27s

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