Tests

Fix incorrect TypeVar default expansion order (Fixes #20336) #19581

Job	Run time
Test mypyc suite with 32-bit Python	9m 11s
Test suite with py313-ubuntu, mypyc-compiled	15m 35s
Test suite with py310-ubuntu, mypyc-compiled	15m 0s
Test suite with py314-ubuntu, mypyc-compiled	14m 38s
Test suite with py311-ubuntu	9m 21s
Formatting and code style with Black + ruff	2m 16s
mypyc runtime tests with py310-ubuntu	5m 29s
Test suite with py314-windows-64	27m 57s
Type check our own code (py310-ubuntu)	1m 25s
Test suite with py312-ubuntu	10m 16s
mypyc runtime tests with py313-macos	5m 57s
Type check our own code (py310-windows-64)	2m 25s
	1h 59m 30s

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