OTLP encoding extension

Status
Stability	alpha
Distributions	[]
Issues
Code Owners	@dao-jun, @VihasMakwana

This extension unmarshals and marshals data encoded according to the OTLP specification.

It accepts OTLP data encoded using Protobuf or JSON protocols.

Example using Protobuf protocol:

extensions:
  otlp_encoding:
    protocol: otlp_proto

Example using JSON protocol:

extensions:
  otlp_encoding:
    protocol: otlp_json