test(protobuf): add tests for state_diff conversion #12383

Job	Run time
check-starknet_api-dependency	10s
build-papyrus-utilities-image	13m 6s
check	32s
clippy	53s
codecov	6m 40s
commitlint	18s
doc	47s
executable-run	2m 33s
executable-run-no-rpc	2m 23s
integration-test	2m 31s
random-table-test	9s
rustfmt	27s
test	4m 56s
test-no-rpc	1m 4s
udeps	3m 31s
	40m 0s

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