[TASK] FormEngineValidation on speed

This patch removes the setTimeout hacks from FormEngineValidation.js.
Since the removal of ExtJS from FormEngine this hacky solution could be
removed and speed up the FormEngine validation process.

Resolves: #79765
Releases: master
Change-Id: I18f38a1641ea7916844cd464da3f31ad0fc22517
Reviewed-on: https://review.typo3.org/51643


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>