change(rpc): Update `getblock` RPC to more closely match zcashd #2159

Job	Run time
Generate crates matrix	19s
Check crates matrix	2s
Build zebrad crate	37m 20s
Build zebra-utils crate	17m 0s
Build zebra-test crate	1m 37s
Build zebra-state crate	22m 54s
Build zebra-script crate	3m 8s
Build zebra-scan crate	26m 6s
Build zebra-rpc crate	33m 53s
Build zebra-node-services crate	3m 12s
Build zebra-network crate	6m 34s
Build zebra-grpc crate	14m 37s
Build zebra-consensus crate	18m 4s
Build zebra-chain crate	4m 49s
Build tower-fallback crate	1m 5s
Build tower-batch-control crate	1m 25s
Open or update issues for building crates individually failures	0s
	3h 12m 5s

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