[!!!][TASK] Remove TCA + DB definition for pages_language_overlay

The TCA schema and the database of page translations within "pages_language_overlay"
was still available for legacy reasons, but is now gone.

Resolves: #91479
Releases: master
Change-Id: Id330273f9bf72335b685c43f819080bca2864adb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64586


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>