Iteratorify some tableaux (#3887) #149

Job	Run time
test (1.6, short, ubuntu-latest)	1h 16m 35s
test (1.6, long, ubuntu-latest)	1h 3m 7s
test (1.10, short, ubuntu-latest)	54m 42s
test (1.10, long, ubuntu-latest)	46m 2s
test (1.11-nightly, short, ubuntu-latest)	22m 33s
test (1.11-nightly, long, ubuntu-latest)	46m 2s
test (nightly, short, ubuntu-latest)	46m 11s
test (nightly, long, ubuntu-latest)	50m 28s
test (1.10, short, ubuntu-latest, depwarn=error)	54m 31s
test (1.10, long, ubuntu-latest, depwarn=error)	49m 18s
test (1.10, short, macOS, RPTU)	1s
test (1.10, long, macOS, RPTU)	1s
test (1.10, book, ubuntu-latest)	1h 29m 24s
doctest (1.10, ubuntu-latest)	29m 0s
doctest (1.11-nightly, ubuntu-latest)	27m 18s
doctest (nightly, ubuntu-latest)	28m 55s
doctest (1.10, ubuntu-latest, depwarn=error)	28m 54s
doctest (1.10, macOS, RPTU)	1s
	11h 53m 3s

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