Add drive-* icons for YaST Partitioner

Summary:
Add drive-harddisk-encrypted, drive-multidisk, drive-multipartition and drive-partition

These icons are needed by the YaST Partitioner tool. There is currently no 64px version of drive-multipartition because I couldn't come up with any good ideas for it, but a 64px version won't actually be used by YaST Partitioner either.

Test Plan:

Reviewers: VDG, ngraham

Reviewed By: VDG, ngraham

Subscribers: ngraham, kde-frameworks-devel, VDG

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D17421