Tests

Fix the exportjson tool (.ff cache to .json conversion) (#21628) #22566

Job	Run time
Test suite with py311-ubuntu	9m 49s
Test suite with py314-ubuntu, mypyc-compiled	16m 45s
Test suite with py315-ubuntu, mypyc-compiled	16m 1s
Test suite with py313-ubuntu, mypyc-compiled	17m 2s
Test mypyc suite with 32-bit Python	10m 47s
Test suite with py310-ubuntu, mypyc-compiled	17m 9s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 8s
Parallel tests with py314-windows-64, interpreted	11m 57s
Test suite with py314-windows-64	32m 14s
mypyc runtime tests with py313-macos	8m 34s
Test suite with py314t-ubuntu, mypyc-compiled	17m 29s
Type check our own code (py310-windows-64)	1m 49s
Formatting and code style with Black + ruff	1m 57s
Test suite with py312-ubuntu	10m 23s
Type check our own code (py310-ubuntu)	1m 11s
mypyc runtime tests with py310-ubuntu	7m 39s
Parallel tests with py314-ubuntu, interpreted	25m 5s
	3h 54m 59s

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