[TASK] Remove usage of setForm from PageLayoutController

Resolves: #71203
Releases: master
Change-Id: Ie2bf6822238573917f808137f2923af94b3a72db
Reviewed-on: https://review.typo3.org/44443


Reviewed-by: Gernot Schulmeister <gernotschulmeister@gmx.at>
Tested-by: Gernot Schulmeister <gernotschulmeister@gmx.at>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>