Incompatibility with the group_menu_content_module

Problem/Motivation

This is a follow-up from 🐛 "Parent link" option unusable in group_content_menu menus Fixed . When the group_content_menu module is enabled with the latest patch from #3322209: Menu Item Extras adding links integration issue → it becomes impossible to add/edit menus. The following exception is thrown:

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "entity:menu_link_content:group_menu_link_content-1" plugin does not exist. Valid plugin IDs for Drupal\Core\TypedData\TypedDataManager are: entity_revision, .....

Steps to reproduce

• Install the Group content menu → module.
• Apply the patch from #3322209: Menu Item Extras adding links integration issue → . Patch link - https://git.drupalcode.org/project/group_content_menu/-/commit/52a708a.p...
• Follow steps at 🐛 "Parent link" option unusable in group_content_menu menus Fixed .

The exception is thrown on the menu link add/edit.

Proposed resolution

Remaining tasks