[FEATURE] Improve userFunc parameter parsing in conditions

userFunc TypoScript conditions can be improved to use CSV-like
syntax for parameters.

Resolves: #47301
Related: #47159
Releases: 6.2
Change-Id: Ia2a170d0b8eb160607fbd39bd9afbe6ffab679a5
Reviewed-on: https://review.typo3.org/20007
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
Reviewed-by: Markus Klein
Tested-by: Markus Klein