[BUGFIX] Avoid PHP 8.x error in RecordHistory if BE user is missing

Resolves: #97228
Releases: main, 11.5
Change-Id: I139a7f2dcf1e5ed35675a626b9aa496fe24061a7
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74021


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Bartsch <bo@cedev.de>