CSUB-1010: Add integration tests for blockchain & check block time from chainspec #627

Job	Run time
docker-build	26m 4s
cargo audit	37s
build-creditcoin-node	6m 56s
check	1m 5s
Clippy	4m 37s
Rustfmt	14s
javascript-lint / cli	29s
javascript-typecheck / cli	23s
sanity-test-cli	28s
javascript-check-format / cli	27s
sanity-tests	4s
🐚 Shellcheck	8s
unit-test-cli	33s
unit-test-creditcoin	4m 58s
build-creditcoin-node-fast-runtime	6m 30s
integration-test-chainspec-devnet	32s
integration-test-chainspec-testnet	38s
integration-test-check-extrinsics	1m 9s
integration-test-smart-contract	20m 11s
integration-test-cli	21m 11s
integration-test-blockchain	32s
	1h 37m 46s

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