Tests

[mypyc] Enable assertions in tests and fix failures (#20553) #20065

Job	Run time
Test mypyc suite with 32-bit Python	9m 54s
Test suite with py313-ubuntu, mypyc-compiled	14m 30s
Parallel tests with py314-ubuntu, interpreted	23m 18s
Test suite with py312-ubuntu	10m 6s
Type check our own code (py310-ubuntu)	1m 28s
Test suite with py311-ubuntu	9m 21s
Test suite with py314-ubuntu, mypyc-compiled	15m 11s
mypyc runtime tests with py310-ubuntu	5m 59s
Formatting and code style with Black + ruff	2m 1s
Type check our own code (py310-windows-64)	2m 21s
Test suite with py314t-ubuntu, mypyc-compiled	17m 13s
Test suite with py314-windows-64	26m 38s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 11s
Test suite with py310-ubuntu, mypyc-compiled	15m 24s
mypyc runtime tests with py313-macos	5m 41s
	3h 6m 16s

Provide feedback