[BUGFIX] Streamline page translation localization modes for enableFields

During the migration of page translations from pages_language_overlay
some fields have been migrated to a localization mode.

hidden, starttime and endtime can currently not be configured on a
per language-basis, which was possible before.

The fields are now settable on a per-language basis.

Resolves: #83082
Releases: master
Change-Id: Ibd401c38f3f8f8dfaaab9e459e1df284ecb625ea
Reviewed-on: https://review.typo3.org/54751


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>