Tests

[mypyc] feat: add ascii format fast path #20345

Job	Run time
Test mypyc suite with 32-bit Python	9m 24s
Test suite with py313-ubuntu, mypyc-compiled	14m 35s
Test suite with py314-ubuntu, mypyc-compiled	15m 32s
Test suite with py312-ubuntu	9m 52s
Test suite with py311-ubuntu	9m 23s
Test suite with py314-windows-64	27m 17s
Type check our own code (py310-ubuntu)	1m 49s
Parallel tests with py314-ubuntu, interpreted	22m 48s
Type check our own code (py310-windows-64)	2m 39s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 53s
mypyc runtime tests with py313-macos	7m 39s
Test suite with py314t-ubuntu, mypyc-compiled	18m 6s
Test suite with py310-ubuntu, mypyc-compiled	14m 50s
mypyc runtime tests with py310-ubuntu	5m 25s
Formatting and code style with Black + ruff	2m 7s
	3h 10m 19s

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