[Cursors] link *-resize to *_corner cursor

Summary:
When hovering at the window corner in Nautilus an Adwaita curser is shown. Link it to the Breeze equivalent.

BUG: 399194

Test Plan:
Before:

After:

Reviewers: Breeze, hpereiradacosta, ngraham, andreask

Reviewed By: Breeze, ngraham

Subscribers: plasma-devel

Tags: Plasma

Differential Revision: https://phabricator.kde.org/D15889