[BUGFIX] Show information if access is not allowed in element information

If the access to the element information is not allowed, show some
information to the user instead of returning an empty string.

Resolves: #83067
Releases: master, 8.7
Change-Id: Ie4ca3ba41556813a44802fc60befe164a17c4178
Reviewed-on: https://review.typo3.org/54811


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Henning Liebe <h.liebe@neusta.de>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>