Tests

Prevent crash on generic NamedTuple with unresolved typevar bound #14731

Job	Run time
Test suite with py39-ubuntu, mypyc-compiled	13m 18s
Test mypyc suite with 32-bit Python	7m 20s
Test suite with py39-windows-64	20m 47s
Test suite with py310-ubuntu	9m 23s
Test suite with py311-ubuntu, mypyc-compiled	11m 29s
Test suite with py312-ubuntu, mypyc-compiled	12m 28s
Test suite with py313-ubuntu, mypyc-compiled	12m 40s
mypyc runtime tests with py39-macos	4m 0s
Type check our own code (py39-ubuntu)	1m 57s
Type check our own code (py39-windows-64)	2m 35s
Formatting and code style with Black + ruff	1m 38s
	1h 37m 35s

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