change(rpc): Update `getblock` RPC to more closely match zcashd #2095

Job	Run time
Generate crates matrix	16s
Check crates matrix	7s
Build zebrad crate	37m 17s
Build zebra-utils crate	16m 24s
Build zebra-test crate	1m 33s
Build zebra-state crate	22m 48s
Build zebra-script crate	3m 28s
Build zebra-scan crate	27m 19s
Build zebra-rpc crate	35m 4s
Build zebra-node-services crate	3m 39s
Build zebra-network crate	6m 37s
Build zebra-grpc crate	15m 2s
Build zebra-consensus crate	16m 52s
Build zebra-chain crate	4m 50s
Build tower-fallback crate	1m 6s
Build tower-batch-control crate	1m 30s
Open or update issues for building crates individually failures	0s
	3h 13m 52s

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