MM-26834 - Move opentracing into a separate package (#15011)

Makefile

@@ -208,7 +208,7 @@ endif
 app-layers: ## Extract interface from App struct
 	$(GO) get -modfile=go.tools.mod github.com/reflog/struct2interface
 	$(GOBIN)/struct2interface -f "app" -o "app/app_iface.go" -p "app" -s "App" -i "AppIface" -t ./app/layer_generators/app_iface.go.tmpl
-	$(GO) run ./app/layer_generators -in ./app/app_iface.go -out ./app/opentracing_layer.go -template ./app/layer_generators/opentracing_layer.go.tmpl
+	$(GO) run ./app/layer_generators -in ./app/app_iface.go -out ./app/opentracing/opentracing_layer.go -template ./app/layer_generators/opentracing_layer.go.tmpl
 
 i18n-extract: ## Extract strings for translation from the source code
 	$(GO) get -modfile=go.tools.mod github.com/mattermost/mattermost-utilities/mmgotool