Send telemetry data using grpcurl

[krzko]

Is your feature request related to a problem?

The library currently supports OTLP (HTTP), but would be nice to support OTLP (gRPC) aswell. Investigate utilising grpcurl for this uplift.

Describe the solution you'd like

Utilise the OTEL protos to then sent unary request via grpcurl

Describe alternatives you've considered

Additional context