Send data to opentelemetry-collector using grpc for node only

[obecny]

[Ema93sh]

@mayurkale22 would love to pick this one if its okay with you

[mayurkale22]

@Ema93sh I assigned to you. Just so you know, we used gRPC transport in the OpenCensus Node agent exporter (code link). Feel free to reuse few pieces from there.

[dyladan]

@Ema93sh any updates on this? Feel free to let someone know if you have questions or need help