[!!!][TASK] Remove sys_domain.forced database field

The DB setting "sys_domain.forced" is confusing and does not make sense
nowadays, especially with nested domain records - where the rootline is now
correctly traversed with the RootLine utility.

Resolves: #82926
Releases: master
Change-Id: I874c54aeb03c0b62c9a1cebc9d629cee7550ec0b
Reviewed-on: https://review.typo3.org/54540


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Daniel Gorges <daniel.gorges@b13.de>
Tested-by: Daniel Gorges <daniel.gorges@b13.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>