refactor(@angular-devkit/core): deprecate PartiallyOrderedSet (#33051) #3472

Job	Run time
list	19s
workflow (build-unit-tests)	2m 26s
workflow (devkit-core-tests)	1m 35s
workflow (modules-builder-tests)	1m 46s
workflow (build-cli)	1m 54s
workflow (devkit-core-tests-rerun)	1m 35s
	9m 35s

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