Tests

Better narrowing for enums and other types with known equality #21833

Job	Run time
Test mypyc suite with 32-bit Python	10m 43s
Test suite with py314t-ubuntu, mypyc-compiled	17m 29s
Parallel tests with py314-windows-64, interpreted	7m 19s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 7s
Type check our own code (py310-windows-64)	2m 4s
Test suite with py310-ubuntu, mypyc-compiled	15m 48s
Parallel tests with py314-ubuntu, interpreted	23m 19s
mypyc runtime tests with py310-ubuntu	6m 31s
Test suite with py311-ubuntu	9m 0s
Test suite with py314-windows-64	25m 25s
Type check our own code (py310-ubuntu)	1m 13s
mypyc runtime tests with py313-macos	4m 42s
Test suite with py312-ubuntu	9m 14s
Test suite with py313-ubuntu, mypyc-compiled	15m 48s
Formatting and code style with Black + ruff	1m 47s
Test suite with py314-ubuntu, mypyc-compiled	15m 21s
	3h 12m 50s

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