tools/mmgotool: move into monorepo (#24010)

server/Makefile

@@ -332,11 +332,11 @@ app-layers: ## Extract interface from App struct
 	$(GO) run ./channels/app/layer_generators -in ./channels/app/app_iface.go -out ./channels/app/opentracing/opentracing_layer.go -template ./channels/app/layer_generators/opentracing_layer.go.tmpl
 
 i18n-extract: ## Extract strings for translation from the source code
-	$(GO) install github.com/mattermost/mattermost-utilities/mmgotool@mono-repo
+	cd ../tools/mmgotool && $(GO) install .
 	$(GOBIN)/mmgotool i18n extract --portal-dir=""
 
 i18n-check: ## Exit on empty translation strings and translation source strings
-	$(GO) install github.com/mattermost/mattermost-utilities/mmgotool@mono-repo
+	cd ../tools/mmgotool && $(GO) install .
 	$(GOBIN)/mmgotool i18n clean-empty --portal-dir="" --check
 	$(GOBIN)/mmgotool i18n check-empty-src --portal-dir=""