[!!!][TASK] Drop FormEngine popup configuration

The options `options.popupWindowSize` and `options.rte.popupWindowSize`
used to configure popup sizes have been removed.

Most of the popups are rendered as modals that don't allow configured
sizes, the remaining popups have hardcoded sizes.

Resolves: #88657
Releases: master
Change-Id: Ide212d0669e8c4bc199263c5fe868529cbbc7930
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61195


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Johannes Seipelt <johannes.seipelt@3m5.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>