New go protoc

[Dudesons]

Summary

Update the docker image to use the new repository for the golang protoc gen

From github.com/golang/protobuf:

It has been superseded by the google.golang.org/protobuf module, which contains an updated and simplified API, support for protobuf reflection, and many other improvements.
We recommend that new code use the google.golang.org/protobuf module.

Versions v1.4 and later of github.com/golang/protobuf are implemented in terms of google.golang.org/protobuf.
Programs which use both modules must use at least version v1.4 of this one.

From github.com/protocolbuffers/protobuf-go:

This project is the second major revision of the Go protocol buffer API implemented by the google.golang.org/protobuf module.
The first major version is implemented by the github.com/golang/protobuf module.

Changes

• Use the new repository of the goland protobuffer in order to have future update
• Update the doc

Notes for Reviewers

...

Release Notes

• Update https://github.com/golang/protobuf to https://github.com/protocolbuffers/protobuf-go

[rvolosatovs]

Thanks!