Tests

Fix debug build setup #20260

Job	Run time
Test mypyc suite with 32-bit Python	6m 0s
Test suite with py314t-ubuntu, mypyc-compiled	5m 56s
Test suite with py311-ubuntu	5m 57s
mypyc runtime tests with py310-debug-build-ubuntu	2m 46s
Test suite with py310-ubuntu, mypyc-compiled	5m 57s
Test suite with py313-ubuntu, mypyc-compiled	5m 56s
Test suite with py312-ubuntu	5m 57s
mypyc runtime tests with py313-macos	4m 7s
Test suite with py314-windows-64	5m 53s
Parallel tests with py314-ubuntu, mypyc-compiled	5m 56s
mypyc runtime tests with py310-ubuntu	5m 35s
Formatting and code style with Black + ruff	1m 52s
Type check our own code (py310-ubuntu)	1m 40s
Test suite with py314-ubuntu, mypyc-compiled	5m 57s
Type check our own code (py310-windows-64)	3m 14s
Parallel tests with py314-ubuntu, interpreted	5m 59s
	1h 18m 42s

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