Tests

Remove export_map logic (#20490) #20118

Job	Run time
Test mypyc suite with 32-bit Python	9m 26s
Test suite with py314t-ubuntu, mypyc-compiled	17m 25s
Test suite with py313-ubuntu, mypyc-compiled	15m 11s
mypyc runtime tests with py313-macos	7m 4s
Test suite with py311-ubuntu	9m 21s
Type check our own code (py310-ubuntu)	1m 40s
mypyc runtime tests with py310-ubuntu	5m 34s
Test suite with py312-ubuntu	10m 2s
Test suite with py310-ubuntu, mypyc-compiled	15m 24s
Test suite with py314-windows-64	27m 11s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 48s
Test suite with py314-ubuntu, mypyc-compiled	15m 11s
Type check our own code (py310-windows-64)	2m 30s
Formatting and code style with Black + ruff	2m 1s
Parallel tests with py314-ubuntu, interpreted	23m 27s
	3h 9m 15s

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