chore: upgrade go-control-plane

[lobkovilya]

Summary

Upgrade go-control-plane up to v0.9.5. This led to upgrading grpc and protobuf. A lot of tests started failing with new protobuf, apparently, new protobuf treats differently empty fields, so error messages also became slightly different.

I pinned protobuf version to v1.3.2 as it was before using

replace github.com/golang/protobuf => github.com/golang/protobuf v1.3.2

[subnetmarco]

What would it take to also upgrade protobuf and be done with it?

[lobkovilya]

@subnetmarco at first I updated go-control-plane dependency in a wrong way (with -u flag) and that led to updating all other dependencies including protobuf. I updated go-control-plane dependency in a proper way now and we don't need anymore to pin the version.

So that's fine now, we use the same protobuf v.1.3.2 as the latest go-control-plane does.

[jakubdyszkiewicz]

Nice! don't forget about changelog