Add root version of drive-harddisk

Summary:
T8349
BUG: 399307
I did not add `drive-harddisk-home` in this commit because it was simply too difficult to make an easily readable symbol for home on the 16px version.

Test Plan: {F6387968, size=full}

Reviewers: #vdg, ngraham

Reviewed By: #vdg, ngraham

Subscribers: ngraham, kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D16633