With the introduction of CKEditor in TYPO3 v8, the support
for images in RTEs is dropped, however functionality was kept
for compatibility with RTEHtmlArea, which was still available in TYPO3 v8
as separate extension.

The functionality to handle images in CKEditor is possible to
be applied again, however, as this cannot be managed properly
via FAL in its current state, the previous functionality is remvoed
from Core. Separate CKEditor extensions as already published,
are able to manage the image handling in CKEditor directly already.

Dropped
* setting TYPO3_CONF_VARS[BE][RTE_imageStorageDir]
* transformation setting "ts_images".
* softref "images" logic
* ImportExport->getRTEoriginalFilename()
* RteHtmlParser->TS_images_rte()
* CLI Command: cleanup:rteimages and Class RteImagesCommand

Resolves: #88500
Releases: master
Change-Id: Ie564b19a7d0f9b7d46398094c8d7ecd845e31a65
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60886


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Gorges <daniel.gorges@b13.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Daniel Gorges <daniel.gorges@b13.de>
Reviewed-by: Benni Mack <benni@typo3.org>