Feat/grpc transcoding #1138

Job	Run time
Compile Benchmarks	4m 9s
Checks	3m 15s
Gradle tests	6m 10s
Maven tests	6m 49s
Docs	5m 8s
Compile and test (2.13)	9m 12s
Compile and test (3.3)	8m 54s
sbt scripted tests (gen-scala-server, 2.13)	12m 30s
sbt scripted tests (gen-java, 2.13)	7m 42s
sbt scripted tests (scala-2_13, 2.13)	7m 29s
sbt scripted tests (scala3, 3.3)	6m 37s
	1h 17m 55s

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