[TASK] Doctrine: Migrate ext:backend/Classes/Controller/PageLayoutController

Convert all methods exec_SELECTcountRows() to Doctrine DBAL based API.

Change-Id: I67ba40dafd1a5d5be80750b1bcbc1fe26cfa7d27
Releases: master
Resolves: #77051
Reviewed-on: https://review.typo3.org/49157


Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>