Add contract-utils binary #1572

Job	Run time
check	3m 10s
audit	23s
test	9m 5s
clippy	39s
rustfmt	8s
cross-mipsel	40s
cross-aarch64	46s
cross-armv7	38s
cross-mips	39s
integration-test-five-nodes	13m 27s
integration-test-validate-contract	12m 44s
integration-test-multi-exit	14m 5s
integration-test-althea-payment	17m 18s
integration-test-debts	17m 31s
integration-test-db-migration	12m 33s
integration-test-eth-payments	15m 11s
	1h 58m 57s

Provide feedback