Generate golang code for non-serving protos (#618)

* Generate golang code for non-serving protos as well

* Generate code with protoc 3.10.0

* Unnest from third_party dir

Makefile

@@ -82,7 +82,8 @@ install-go-ci-dependencies:
 	go get -u golang.org/x/lint/golint
 
 compile-protos-go: install-go-ci-dependencies
-	@$(foreach dir,types serving, cd ${ROOT_DIR}/protos; protoc -I/usr/local/include -I. --go_out=plugins=grpc,paths=source_relative:../sdk/go/protos/ feast/$(dir)/*.proto;)
+	cd ${ROOT_DIR}/protos; protoc -I/usr/local/include -I. --go_out=plugins=grpc,paths=source_relative:../sdk/go/protos/ tensorflow_metadata/proto/v0/*.proto
+	$(foreach dir,types serving core storage,cd ${ROOT_DIR}/protos; protoc -I/usr/local/include -I. --go_out=plugins=grpc,paths=source_relative:../sdk/go/protos feast/$(dir)/*.proto;)
 
 test-go:
 	cd ${ROOT_DIR}/sdk/go; go test ./...

protos/tensorflow_metadata/proto/v0/path.proto

@@ -20,6 +20,7 @@ package tensorflow.metadata.v0;
 
 option java_package = "org.tensorflow.metadata.v0";
 option java_multiple_files = true;
+option go_package = "github.com/gojek/feast/sdk/go/protos/tensorflow_metadata/proto/v0";
 
 // A path is a more general substitute for the name of a field or feature that
 // can be used for flat examples as well as structured data. For example, if

protos/tensorflow_metadata/proto/v0/schema.proto

@@ -23,6 +23,7 @@ import "tensorflow_metadata/proto/v0/path.proto";
 option cc_enable_arenas = true;
 option java_package = "org.tensorflow.metadata.v0";
 option java_multiple_files = true;
+option go_package = "github.com/gojek/feast/sdk/go/protos/tensorflow_metadata/proto/v0";
 
 // LifecycleStage. Only UNKNOWN_STAGE, BETA, and PRODUCTION features are
 // actually validated.