Use protoc action #21

Job	Run time
clippy	1m 29s
fmt	4s
build	2m 2s
tests (mobile-packet-verifier)	1m 40s
tests (file-store)	1m 22s
tests (ingest)	1m 31s
tests (reward-scheduler)	32s
tests (task-manager)	36s
tests-postgres (boost-manager)	1m 56s
tests-postgres (iot-config)	2m 32s
tests-postgres (iot-packet-verifier)	3m 1s
tests-postgres (iot-verifier)	2m 0s
tests-postgres (mobile-config)	1m 47s
tests-postgres (mobile-verifier)	2m 1s
build-release	0s
	22m 33s

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