[TASK] Move code from PageLayoutView to proper class

The code is only used in PageInformationController and should
therefore reside in this class instead of PageLayoutView.

Resolves: #78289
Releases: master
Change-Id: I049782082a4cea9df2d777093c387b3b45756957
Reviewed-on: https://review.typo3.org/50220


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>