chore: `VisitedPcs` trait in `CachedState` #26

Job	Run time
format	13s
clippy	29s
commitlint	8s
featureless-build	1m 8s
native-blockifier-artifacts-push	6m 40s
run-python-tests	7s
run-tests	1m 41s
udeps	48s
	11m 14s

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