Tests

Clean-up classes nested in functions #22277

Job	Run time
Test mypyc suite with 32-bit Python	11m 17s
Test suite with py313-ubuntu, mypyc-compiled	16m 27s
Test suite with py311-ubuntu	9m 44s
Test suite with py310-ubuntu, mypyc-compiled	17m 7s
Type check our own code (py310-windows-64)	1m 53s
Test suite with py312-ubuntu	10m 2s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 46s
Test suite with py314t-ubuntu, mypyc-compiled	17m 21s
Parallel tests with py314-windows-64, interpreted	11m 25s
Test suite with py315-ubuntu, mypyc-compiled	15m 49s
Test suite with py314-windows-64	31m 12s
Type check our own code (py310-ubuntu)	1m 4s
Formatting and code style with Black + ruff	1m 51s
mypyc runtime tests with py313-macos	6m 23s
Test suite with py314-ubuntu, mypyc-compiled	16m 10s
Parallel tests with py314-ubuntu, interpreted	26m 32s
mypyc runtime tests with py310-ubuntu	6m 41s
	3h 49m 44s

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