[!!!][TASK] Remove regular expression based validation in ext:form

Resolves: #101070
Related: #100963
Related: #97016
Releases: main
Change-Id: I3e8b915b2c0e8156f7611a12be3c359c028a7288
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79386


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>