Add missed translations (#8959)

utils/file_backend.go

@@ -42,5 +42,5 @@ func NewFileBackend(settings *model.FileSettings, enableComplianceFeatures bool)
 			directory: settings.Directory,
 		}, nil
 	}
-	return nil, model.NewAppError("NewFileBackend", "No file driver selected.", nil, "", http.StatusInternalServerError)
+	return nil, model.NewAppError("NewFileBackend", "api.file.no_driver.app_error", nil, "", http.StatusInternalServerError)
 }