[!!!][TASK] Remove cache_imagesizes

This change removes the cache "imagesizes" along
with the public methods within GraphicalFunctions.

The main reason for having cache_imagesizes back in
TYPO3 v4.x was that detecting the image sizes was done
via ImageMagick solely.

Nowadays, the ImageInfo functionality is used,
which uses

- getimagesize()
- exif_read_data()

before falling back to ImageMagick identify.

Most places in TYPO3 Core already use ImageInfo directly
without using the cache.

A image size calculation is nowadays with SSD much faster
than a decade before, whereas a DB cache (by default) for
cache_imagesizes has a much more latency.

As cache_imagesizes is solely used for local files,
remote FAL drivers do not have a problem here as well.

Removed public methods:
- GraphicalFunctions->cacheImageDimensions()
- GraphicalFunctions->getCachedImageDimensions()

The main public method GraphicalFunctions->getImageDimensions()
still continues to exist and work as before.

Resolves: #102009
Releases: ma...