refactor(zetaclient): subscribe to new blocks in scheduler #3073

Job	Run time
build-zetanode	2m 36s
matrix-conditionals	3s
start-e2e-import-mainnet-test / e2e	0s
start-e2e-consensus-test / e2e	0s
start-e2e-admin-test / e2e	0s
start-e2e-performance-test / e2e	10m 32s
start-e2e-test / e2e	9m 19s
start-legacy-test / e2e	0s
start-ton-test / e2e	0s
start-solana-test / e2e	0s
start-tss-migration-test / e2e	0s
start-upgrade-import-mainnet-test / e2e	0s
start-upgrade-test-light / e2e	0s
start-upgrade-test / e2e	0s
e2e-ok	6s
	22m 36s

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