Add missing renamed event when a destination file already existed

Summary: This was missing when a file was being copied/moved, its destination existed, and the user chose to rename the destination file or autorename was set.

Test Plan: ctest -R kiocore-jobtest

Reviewers: Frameworks, ervin, dfaure

Reviewed By: dfaure

Subscribers: kde-frameworks-devel

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D26878