[TASK] Define ImageService as lowlevel service

As identified in #94491, ImageService may be used
in installtool context and is therefore now
defined as lowlevel service via a service provider,
to ensure its dependencies are always available
in install tool contexts.

Resolves: #94493
Related: #94491
Related: #89892
Releases: master
Change-Id: I76934bb48336adb654a82ec23a9b6a1584c5ced9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69727


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>