[BUGFIX] Do not stop indexing on errors

The FAL indexer stopped the whole indexing queue if any error occured.
While single files might not be indexed, the whole process should not
be stopped because of it. Exceptions while indexing are now caught and
logged, but the indexing process continued.

Resolves: #62253
Releases: master, 9.5
Change-Id: Id64cfb59d7e94edf52ca941254761a2014a3aa06
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63815


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>