[Consensus Observer] Add block payload verification. #61738

Job	Run time
file_change_determinator	11s
rust-consensus-only-smoke-test	0s
rust-consensus-only-unit-test	0s
rust-unit-tests	0s
rust-cargo-deny	1m 39s
general-lints	1m 58s
rust-build-cached-packages	7m 47s
rust-cryptohasher-domain-separation-check	0s
rust-lints	10m 48s
rust-smoke-tests	1h 40m 0s
rust-targeted-unit-tests	19m 48s
	2h 22m 11s

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