[BUGFIX] Only use SaltedHashingMethods marked as available

When determining the SaltedHashingMethod of a salted hash check only
SaltedHashingMethods which are marked as available.

Resolves: #85526
Releases: master, 8.7
Change-Id: I72ca88ce35c891dc149d0628543d30b6c4122407
Reviewed-on: https://review.typo3.org/57520


Reviewed-by: Stephan Großberndt <stephan.grossberndt@typo3.org>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>