Merge branch '70-gnmi-proto-encoding' into '67-overhaul-architecture'

cmd/gnmi-target/target.go

cmd/gnmi-telemetry/telemetry.go

cmd/gnmi/gnmi.go

forks/goarista/gnmi/client.go

forks/goarista/gnmi/operation.go

forks/google/gnmi/model.go

forks/google/gnmi/modeldata/gostruct/gen.go

forks/google/gnmi/modeldata/gostruct/generated.go

forks/google/gnmi/modeldata/modeldata.go

forks/google/gnmi/server.go

forks/google/gnmi/server_test.go

forks/google/gnmi/util.go

go.mod

go.sum

nucleus/device.go

nucleus/gnmi_transport.go

nucleus/gnmi_transport_test.go

nucleus/principalNetworkDomain.go

nucleus/southbound.go