Provide Zebra compatibility: re-enable and fix zcash_client_backend, update prost dependency version #363

Job	Run time
Bitrot check	1m 15s
Bitrot check	1m 15s
Latest build on ubuntu-latest	41s
Latest build on ubuntu-latest	41s
Latest build on windows-latest	3m 27s
Latest build on windows-latest	3m 27s
Latest build on macOS-latest	1m 6s
Latest build on macOS-latest	1m 6s
Build target wasm32-wasi	58s
Build target wasm32-wasi	58s
Clippy (MSRV)	1m 8s
Clippy (MSRV)	1m 8s
Check ZFuture build on Linux	22s
Check ZFuture build on Linux	22s
Check ZFuture build on macOS	51s
Check ZFuture build on macOS	51s
Check ZFuture build on Windows	1m 58s
Check ZFuture build on Windows	1m 58s
Clippy (beta)	16s
Clippy (beta)	16s
Code coverage	6m 6s
Code coverage	6m 6s
Intra-doc links	1m 36s
Intra-doc links	1m 36s
Rustfmt	13s
Rustfmt	13s
protobuf consistency	1m 3s
protobuf consistency	1m 3s
Test on Linux	7m 31s
Test on Linux	7m 31s
UUID validity	3s
UUID validity	3s
Test Orchard on Linux	1m 51s
Test Orchard on Linux	1m 54s
Test NU6 on Linux	8m 31s
Test NU6 on Linux	8m 31s
Test on macOS	6m 58s
Test on macOS	6m 58s
Test Orchard on macOS	2m 12s
Test Orchard on macOS	1m 42s
Test on Windows	11m 48s
Test on Windows	11m 48s
Test Orchard on Windows	3m 40s
Test Orchard on Windows	3m 19s
Test NU6 on Windows	13m 25s
Test NU6 on Windows	13m 25s
	2h 33m 10s

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