Add managed entities for "automation" and "configure_xcm" navigation menu items

[jensschuppe]

The menu item with the link to the XCM configuration form is inside a sub-menu called Automation which is being used by other extensions as well (e. g. systopia/de.systopia.sqltasks, systopia/hiorg), the latter of which uses Managed Entities for adding the menu item, trying to match existing entries by name and parent_id, which apparently does not work in tandem with the old-style hook implementations via hook_civicrm_navigationMenu(). Currently, this results in each definition of the automation menu item creating a new one, duplicating it in the menu.

Defining all of those through Managed Entities seems to resolve this issue.

I'm thus adding the configuration menu item and its parent Automation menu item as managed entities, removing their definition from the hook implementation.

[jensschuppe]

This doesn't seem to work correctly. Every definition of the Automation menu item causes a new one and previously added sub-items seem to vanish 😞 I think I'll have to do some more testing.

Seems that multiple Managed entities may not reference the same entity.