[TASK] Use the new FAL Indexer

This patch-set uses the new Indexer for FAL.

See: http://wiki.typo3.org/Blueprints/FAL-IndexerRework

Releases: 6.2
Resolves: #53600
Change-Id: Ibfbb42358a69ba1b7bd90e5643a104b1b6521ff8
Reviewed-on: https://review.typo3.org/25371
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny