expect boards product by default in e2e (#22911)

e2e-tests/playwright/support/constant.ts

@@ -1,6 +1,7 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
+export const appsPluginId = 'com.mattermost.apps';
 export const boardsPluginId = 'focalboard';
 export const boardsProductId = 'boards';
 export const callsPluginId = 'com.mattermost.calls';