Tests

Fix various bugs in TypeVarTuples with defaults #22405

Job	Run time
Test mypyc suite with 32-bit Python	10m 47s
Test suite with py313-ubuntu, mypyc-compiled	16m 14s
Test suite with py314t-ubuntu, mypyc-compiled	18m 49s
Test suite with py310-ubuntu, mypyc-compiled	17m 10s
Test suite with py312-ubuntu	9m 59s
Test suite with py314-ubuntu, mypyc-compiled	16m 21s
Parallel tests with py314-ubuntu, mypyc-compiled	30m 14s
mypyc runtime tests with py310-ubuntu	7m 16s
Parallel tests with py314-windows-64, interpreted	12m 49s
mypyc runtime tests with py313-macos	7m 3s
Test suite with py311-ubuntu	9m 43s
Type check our own code (py310-windows-64)	2m 10s
Parallel tests with py314-ubuntu, interpreted	26m 10s
Test suite with py314-windows-64	32m 45s
Formatting and code style with Black + ruff	1m 52s
Test suite with py315-ubuntu, mypyc-compiled	15m 42s
Type check our own code (py310-ubuntu)	1m 9s
	3h 56m 13s

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