change(rpc): Update `getblock` RPC to more closely match zcashd #2151

Job	Run time
Generate crates matrix	16s
Check crates matrix	2s
Build zebrad crate	2m 37s
Build zebra-utils crate	1m 8s
Build zebra-test crate	1m 26s
Build zebra-state crate	1m 27s
Build zebra-script crate	1s
Build zebra-scan crate	1s
Build zebra-rpc crate	1s
Build zebra-node-services crate	1s
Build zebra-network crate	1s
Build zebra-grpc crate	1s
Build zebra-consensus crate	1s
Build zebra-chain crate	1s
Build tower-fallback crate	1s
Build tower-batch-control crate	1s
Open or update issues for building crates individually failures	0s
	7m 6s

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