refactor(blockifier): diff of StateCache is StateChanges #6493

Job	Run time
executable-run	13m 57s
executable-run-no-rpc	12m 19s
build-papyrus-utilities-image	25s
integration-test	19m 55s
test-no-rpc	7m 12s
random-table-test	3m 8s
	56m 56s

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