Tests

Use nested subscript line numbers in fastparse #22303

Job	Run time
Test mypyc suite with 32-bit Python	10m 30s
mypyc runtime tests with py313-macos	7m 23s
Test suite with py311-ubuntu	9m 9s
Test suite with py314t-ubuntu, mypyc-compiled	17m 39s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 57s
Test suite with py315-ubuntu, mypyc-compiled	15m 58s
Test suite with py310-ubuntu, mypyc-compiled	16m 50s
Test suite with py314-windows-64	28m 49s
Parallel tests with py314-windows-64, interpreted	10m 45s
mypyc runtime tests with py310-ubuntu	6m 53s
Parallel tests with py314-ubuntu, interpreted	26m 8s
Test suite with py312-ubuntu	10m 10s
Formatting and code style with Black + ruff	1m 54s
Test suite with py313-ubuntu, mypyc-compiled	15m 25s
Type check our own code (py310-windows-64)	2m 53s
Type check our own code (py310-ubuntu)	1m 10s
Test suite with py314-ubuntu, mypyc-compiled	16m 28s
	3h 48m 1s

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