Add gRPC topic producer endpoint - Java side #2514

Job	Run time
CLI End to End tests	10m 34s
CLI End to End tests	10m 34s
Unit tests (Runtime)	6m 32s
Unit tests (Runtime)	6m 32s
End to End tests (Python, python)	22m 6s
End to End tests (Python, python)	22m 6s
Unit tests (Runtime IT)	20m 13s
Unit tests (Runtime IT)	20m 13s
End to End tests (Other, other)	19m 20s
End to End tests (Other, other)	19m 20s
Unit tests (Deployer)	7m 59s
Unit tests (Deployer)	7m 59s
Unit tests (Api Gateway)	4m 31s
Unit tests (Api Gateway)	4m 31s
Unit tests (Control plane)	4m 4s
Unit tests (Control plane)	4m 4s
Unit tests (Other)	3m 37s
Unit tests (Other)	3m 17s
Unit tests (Style)	4m 4s
Unit tests (Style)	4m 4s
	3h 25m 40s

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