[BUGFIX] Make QueryGenerator handle multiple label_alt columns

The label_alt field in TCA is a comma separated list of database
columns, so it needs to be exploded before being passed into a
database query.

Resolves: #83268
Releases: master, 10.4
Change-Id: I5daf07acd3ee2d409d970ac896408bec2e0abe33
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70057


Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>