WIP: polymake posets #16618

Job	Run time
doctest (1.10, ubuntu-latest)	25m 9s
doctest (1.11-nightly, ubuntu-latest)	26m 29s
test (1.6, short, ubuntu-latest)	1h 55m 50s
doctest (nightly, ubuntu-latest)	24m 52s
test (1.6, long, ubuntu-latest)	55m 46s
doctest (1.10, ubuntu-latest, depwarn=error)	25m 45s
test (1.10, short, ubuntu-latest)	1h 15m 29s
doctest (1.10, macOS, RPTU)	13m 22s
test (1.10, long, ubuntu-latest)	46m 3s
test (1.11-nightly, short, ubuntu-latest)	1h 21m 48s
test (1.11-nightly, long, ubuntu-latest)	52m 41s
test (nightly, short, ubuntu-latest)	1h 18m 59s
test (nightly, long, ubuntu-latest)	50m 57s
test (1.10, short, ubuntu-latest, depwarn=error)	1h 13m 48s
test (1.10, long, ubuntu-latest, depwarn=error)	49m 28s
test (1.10, short, macOS, RPTU)	15m 21s
test (1.10, long, macOS, RPTU)	15m 26s
test (1.10, book, ubuntu-latest)	53m 44s
	14h 40m 57s

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