Feat/grpc transcoding #1255

Job	Run time
Checks	3m 43s
Docs	3m 36s
Compile and test (2.13)	6m 11s
Compile Benchmarks	4m 0s
Compile and test (3.3)	6m 35s
Gradle tests	8m 40s
Maven tests	5m 28s
sbt scripted tests (gen-scala-server, 2.13)	8m 22s
sbt scripted tests (gen-java, 2.13)	6m 1s
sbt scripted tests (scala-2_13, 2.13)	5m 12s
sbt scripted tests (scala3, 3.3)	5m 50s
	1h 3m 38s

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