feat(consensus): create SingleHeightConsensus struct #11856

Job	Run time
check-starknet_api-dependency	15s
build-papyrus-utilities-image	12m 39s
check	55s
clippy	1m 6s
codecov	6m 35s
commitlint	14s
doc	45s
executable-run	3m 0s
executable-run-no-rpc	2m 45s
integration-test	2m 54s
random-table-test	24s
rustfmt	27s
test	5m 13s
test-no-rpc	1m 18s
udeps	3m 44s
	42m 14s

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