[TASK] Do not log locked backend exceptions

BackendAccessDeniedException is thrown due to inproper client ip.
BackendLockedException is thrown when the backend is locked.

Both cases are desired behaviour, so they should not get logged.

Resolves: #104120
Releases: main, 12.4
Change-Id: If29f4bb58d78a3a3dfcd6d1815ae1b0404311662
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84650


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>