Tests

Fix narrowing for AbstractSet and Mapping #21986

Job	Run time
Test mypyc suite with 32-bit Python	1m 16s
Test suite with py314-ubuntu, mypyc-compiled	1m 28s
Test suite with py314t-ubuntu, mypyc-compiled	1m 28s
Test suite with py312-ubuntu	1m 28s
Test suite with py310-ubuntu, mypyc-compiled	1m 27s
Test suite with py311-ubuntu	1m 55s
Type check our own code (py310-windows-64)	1m 47s
Formatting and code style with Black + ruff	1m 29s
Parallel tests with py314-windows-64, interpreted	1m 21s
Test suite with py314-windows-64	1m 48s
mypyc runtime tests with py310-ubuntu	1m 28s
Type check our own code (py310-ubuntu)	1m 9s
Test suite with py313-ubuntu, mypyc-compiled	1m 27s
mypyc runtime tests with py313-macos	1m 30s
Parallel tests with py314-ubuntu, mypyc-compiled	1m 55s
Parallel tests with py314-ubuntu, interpreted	1m 28s
	24m 24s

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