chore: `VisitedPcs` trait in `CachedState` #31

Job	Run time
featureless-build	1m 15s
clippy	21s
commitlint	13s
native-blockifier-artifacts-push	6m 33s
format	24s
run-python-tests	6s
run-tests	1m 37s
udeps	45s
	11m 14s

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