[BUGFIX] EXT:form - let the CountValidator provide its arguments

* Provide the validator's arguments to TYPO3\CMS\Extbase\Validation\Error
* Prevent PHP errors if sprintf is tried to be called in case of empty
  argument arrays

Resolves: #80653
Releases: master, 8.7
Change-Id: I0f399501bc1091aa0034bd4de8652564535ce3f0
Reviewed-on: https://review.typo3.org/52335


Reviewed-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Tested-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>