change(rpc): Update `getblock` RPC to more closely match zcashd #2128

Job	Run time
Generate crates matrix	8s
Check crates matrix	8s
Build zebrad crate	38m 20s
Build zebra-utils crate	17m 21s
Build zebra-test crate	1m 27s
Build zebra-state crate	23m 1s
Build zebra-script crate	3m 16s
Build zebra-scan crate	25m 53s
Build zebra-rpc crate	34m 51s
Build zebra-node-services crate	3m 38s
Build zebra-network crate	6m 35s
Build zebra-grpc crate	15m 13s
Build zebra-consensus crate	18m 17s
Build zebra-chain crate	4m 38s
Build tower-fallback crate	58s
Build tower-batch-control crate	1m 16s
Open or update issues for building crates individually failures	0s
	3h 15m 0s

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