Generate protobuf files too.
Note order is important: we want to generate mocks based on the code
that protoc generates.
package rpc
+//go:generate protoc --go_out=plugins=grpc,paths=source_relative:. rpc.proto
//go:generate go run github.com/golang/mock/mockgen -destination mocks/rpc_mocks.go -copyright_file ../scripts/copyright.txt . CNIBackendClient
