Fix follow notifications from streaming being grouped (#32179)

app/javascript/mastodon/actions/notification_groups.ts

@@ -70,6 +70,10 @@ function dispatchAssociatedRecords(
 
 const supportedGroupedNotificationTypes = ['favourite', 'reblog'];
 
+export function shouldGroupNotificationType(type: string) {
+  return supportedGroupedNotificationTypes.includes(type);
+}
+
 export const fetchNotifications = createDataLoadingThunk(
   'notificationGroups/fetch',
   async (_params, { getState }) =>