Simplified typed assignments #5990

Job	Run time
test_cygwin (39, windows-latest)	15m 46s
collateral (diffcov)	5m 29s
test (3.9, ubuntu-latest)	4m 24s
collateral (docs)	2m 8s
test (3.9, windows-latest)	11m 43s
test (3.13, ubuntu-latest)	5m 24s
test (3.13, macos-latest)	3m 46s
test (3.13, windows-latest)	11m 24s
test (3.10, ubuntu-latest)	4m 28s
test (3.11, ubuntu-latest)	3m 48s
test (3.12, ubuntu-latest)	5m 26s
test (3.14, ubuntu-latest)	6m 45s
test (pypy3.10, ubuntu-latest, stdlib)	15m 54s
test (ubuntu-latest, 3.10, stdlib)	4m 28s
integration-test	0s
check	3s
release	0s
	1h 40m 56s

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