[TASK] Deprecate edit panel related functionality

The frontend editing extension ext:feedit has been
extracted from core monorepo with #87498 in v10.

This rendered stdWrap.editPanel, stdWrap.editIcons
and EDITPANEL content object unused as core
functionality.

The patch deprecates these parts: Extensions that
rely on it - typically ext:feedit and
ext:frontend_editing should integrate stdWrap
using hooks and registering an own EDITPANEL cObj
if needed.

Releases: master
Resolves: #94953
Related: #87498
Change-Id: I489b4fb2d3e09d8b2fcad91b5ae3bccf28244151
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70714


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>