[TASK] EXT:form - Move TypoScript to separate files, reduce complexity

Move TypoScript settings to separate files. Remove TypoScript libraries.
Reduce complexity through direct usage of settings. Remove
unnecessary settings.

The inline documentation will be reduced (with another patchset) as soon
as the rst documentation is up to date.

Resolves: #70219
Releases: master
Change-Id: Ic05d78523f1253c71e033703f5243cdbc35d6b29
Reviewed-on: http://review.typo3.org/43740


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Tested-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>