[FEATURE] TypoScript Condition for page layout

Add a new condition using the PageLayoutResolver to let integrators
check for the used backend layout of a page.

Resolves: #88276
Releases: master
Change-Id: Ifac0e020a72994c9c8499af0afd48179472cb202
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66012


Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Daniel Siepmann <coding@daniel-siepmann.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Daniel Siepmann <coding@daniel-siepmann.de>
Reviewed-by: Benni Mack <benni@typo3.org>