[TASK] Migrate FAL FileCollector to use Dependency Injection

In addition, this class is now fully typed.

Resolves: #101954
Releases: main
Change-Id: I6bca63321171a24ad4efaac97e19db98b676375d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81087


Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>