Add proper edit-delete-shred icons

Summary:
BUG: 109241

FIXED-IN: 5.55

Add some proper `edit-delete-shred` icons; use correct 2px margins for the 32px `edit-delete` icon.

Test Plan:
{F6563882}
The 32px `edit-delete` icon:
{F6561048}

Reviewers: #vdg, ndavis, ngraham

Reviewed By: #vdg, ndavis, ngraham

Subscribers: ndavis, ngraham, kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D18439