[TASK] Fix phpstan checkFunctionArgumentTypes errors in ext:beuser

This patch fixes incompatible type usage in function arguments
and is preparatory work for introducing native type hints and
strict mode in all core files.

Resolves: #92163
Releases: master, 10.4
Change-Id: I4bd53ac85bbdcddfe4867b705068cbfa1d07ace0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65914


Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>