Tests

stubgen: Do not ignore property deleter (#16781) #418

Job	Run time
Test mypyc suite with 32-bit Python	8m 13s
Test suite with py38-ubuntu, mypyc-compiled	19m 55s
Test suite with py38-windows-64	26m 51s
Test suite with py39-ubuntu	18m 47s
Test suite with py310-ubuntu	17m 33s
Test suite with py311-ubuntu, mypyc-compiled	16m 55s
Test suite with py312-ubuntu, mypyc-compiled	20m 6s
mypyc runtime tests with py39-macos	6m 5s
mypyc runtime tests with py38-debug-build-ubuntu	5m 15s
Type check our own code (py38-ubuntu)	1m 43s
Type check our own code (py38-windows-64)	2m 26s
Formatting and code style with Black + ruff	34s
	2h 24m 23s

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