Tests

Revert a perf optimization for deferred nodes #21058

Job	Run time
Test mypyc suite with 32-bit Python	30m 51s
Test suite with py314t-ubuntu, mypyc-compiled	17m 25s
Test suite with py313-ubuntu, mypyc-compiled	14m 19s
Test suite with py312-ubuntu	9m 13s
Test suite with py310-ubuntu, mypyc-compiled	15m 24s
Test suite with py311-ubuntu	8m 36s
Test suite with py314-windows-64	28m 28s
mypyc runtime tests with py310-ubuntu	5m 44s
Test suite with py314-ubuntu, mypyc-compiled	14m 37s
Parallel tests with py314-ubuntu, interpreted	23m 35s
mypyc runtime tests with py313-macos	5m 39s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 16s
Formatting and code style with Black + ruff	1m 51s
Type check our own code (py310-windows-64)	2m 53s
Parallel tests with py314-windows-64, interpreted	10m 38s
Type check our own code (py310-ubuntu)	1m 45s
	3h 40m 14s

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