[BUGFIX] Fix slug generation for non-pages records with pid=0

Resolves: #94655
Releases: master, 10.4
Change-Id: I91b671d4dea58f022c1b5cb9f1c9f4c5c91bb38c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70122


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Stefan Busemann <stefan.busemann@in2code.de>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Stefan Busemann <stefan.busemann@in2code.de>
Reviewed-by: Richard Haeser <richard@richardhaeser.com>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>