Tests

Do not push partial types to the binder #19301

Job	Run time
Test mypyc suite with 32-bit Python	8m 48s
Test suite with py311-ubuntu	9m 20s
Test suite with py314-ubuntu, mypyc-compiled	13m 50s
Test suite with py310-ubuntu	12m 38s
Test suite with py313-ubuntu, mypyc-compiled	14m 20s
Test suite with py312-ubuntu, mypyc-compiled	14m 48s
Test suite with py39-ubuntu, mypyc-compiled	15m 46s
mypyc runtime tests with py313-macos	5m 58s
Type check our own code (py39-ubuntu)	1m 31s
Type check our own code (py39-windows-64)	2m 34s
mypyc runtime tests with py310-ubuntu	4m 20s
Test suite with py314-windows-64	23m 54s
Formatting and code style with Black + ruff	1m 58s
	2h 9m 45s

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