Add test documenting #17230 #12361

Job	Run time
Test mypyc suite with 32-bit Python	7m 8s
Test suite with py38-ubuntu, mypyc-compiled	17m 15s
Test suite with py38-windows-64	19m 50s
Test suite with py39-ubuntu	16m 57s
Test suite with py310-ubuntu	15m 5s
Test suite with py311-ubuntu, mypyc-compiled	16m 0s
Test suite with py312-ubuntu, mypyc-compiled	17m 11s
mypyc runtime tests with py39-macos	4m 11s
mypyc runtime tests with py38-debug-build-ubuntu	4m 26s
Type check our own code (py38-ubuntu)	1m 48s
Type check our own code (py38-windows-64)	2m 46s
Formatting and code style with Black + ruff	40s
	2h 3m 17s

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