Add draw-arrow icons

Summary:
This patch adds draw-highlight icons requested by Okular for D15580.

The design is based on draw-line with an arrowhead. I am not quite sure about the naming as there are already draw-arrow-{up,down,forward,back} icons that symlink to the standard arrow icons. I could not find an application where these are used.

CCBUG: 408283

Test Plan:

Reviewers: VDG, ndavis

Reviewed By: VDG, ndavis

Subscribers: ndavis, kde-frameworks-devel

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D24555