Tests

Correctly aggregate narrowing information on parent expressions #21656

Job	Run time
Test mypyc suite with 32-bit Python	10m 21s
Parallel tests with py314-ubuntu, mypyc-compiled	26m 46s
Parallel tests with py314-ubuntu, interpreted	23m 34s
Test suite with py314-windows-64	26m 49s
mypyc runtime tests with py313-macos	5m 18s
mypyc runtime tests with py310-ubuntu	6m 28s
Test suite with py314t-ubuntu, mypyc-compiled	21m 14s
Parallel tests with py314-windows-64, interpreted	10m 8s
Test suite with py312-ubuntu	9m 30s
Test suite with py310-ubuntu, mypyc-compiled	16m 3s
Test suite with py311-ubuntu	9m 26s
Test suite with py313-ubuntu, mypyc-compiled	15m 9s
Test suite with py314-ubuntu, mypyc-compiled	15m 53s
Formatting and code style with Black + ruff	1m 54s
Type check our own code (py310-windows-64)	2m 47s
Type check our own code (py310-ubuntu)	1m 37s
	3h 22m 57s

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