[TASK] Centralize user debug information display condition

A couple of debug information, e.g. the field- and tablenames
in FormEngine, are displayed depending on the user status
and the debug settings. To simplify the codebase, this condition
is now centralized in BackendUserAuthentication.

Resolves: #97894
Releases: main, 11.5
Change-Id: I5173c48180fbf96f7408c008eeb3c71c25686d0d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75069


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>