[TASK] Migrate FileMetadataOverlayAspect to PSR-14 listener

The existing slot in EXT:frontend for overlaying sys-file-metadata
is migrated to a PSR-14 event listener.

Although this is not a new feature, this is a perfect example of
a migration from SignalSlot to PSR-14 event listener.

Resolves: #89748
Releases: master
Change-Id: I98fb14b0b9c56ea9d8938e29be88ddcf8dd43eb5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62388


Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Daniel Gorges <daniel.gorges@b13.com>
Reviewed-by: Susanne Moog <look@susi.dev>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Gorges <daniel.gorges@b13.com>
Tested-by: Susanne Moog <look@susi.dev>