Tests

Speed up State.finish_passes (#18302) #14177

Job	Run time
Test mypyc suite with 32-bit Python	7m 10s
Test suite with py38-ubuntu, mypyc-compiled	19m 4s
Test suite with py38-windows-64	21m 33s
Test suite with py39-ubuntu	18m 11s
Test suite with py310-ubuntu	17m 53s
Test suite with py311-ubuntu, mypyc-compiled	16m 28s
Test suite with py312-ubuntu, mypyc-compiled	18m 27s
Test suite with py313-ubuntu, mypyc-compiled	18m 44s
mypyc runtime tests with py39-macos	4m 32s
Type check our own code (py38-ubuntu)	1m 58s
Type check our own code (py38-windows-64)	2m 36s
Formatting and code style with Black + ruff	59s
	2h 27m 35s

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