[BUGFIX] Correctly create section menu for pages showing content of other pages

This commit fills the section menu if no page is configured in the ce
and the current page uses the content of another page

Resolves: #92575
Releases: master, 10.4

Change-Id: I8050dc5979c37b35522067540f830d4aa10fca5d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66151


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Tested-by: Richard Haeser <richard@richardhaeser.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Richard Haeser <richard@richardhaeser.com>