kio_trash: Add size, modification, access and create date for trash:/

Summary:
BUG: 413091
FIXED-IN: 5.70

Reviewers: #frameworks, ngraham, elvisangelaccio, dfaure

Reviewed By: dfaure

Subscribers: kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D24773