v2: Switch `grpclog.Infof` with something non-global

[bwplotka]

There is no way to control this on instance lvl, it's only global. Let's fix this.

e.g grpclog.Infof("grpc_opentracing: failed parsing trace information: %v", err) in tracing package.

Not blocking v2 release, we can do later.

[andrey-berenda]

@bwplotka I have created the pr could you watch it?

[bwplotka]

Thanks for the PR, but this is now done, because we decided to remove opentracing completely. It is deprecated (if needed opentracing from v1 can be used) and otherwise users can use otlpgrpc (:

Thanks anyway, and sorry we didn't notice this earlier!