Kicker/RecentUsageModel: Allow to open smb:/ sftp:/ resources

Summary:
Since D10835 opening urls that needed mimetype determination such as smb:/ or sftp:/ urls were always opened with a "Open With" dialog.
To keep the same security but adding some convenience, use KRun::setRunExecutables to disable executable run here.

Reviewers: #plasma, broulik, aleksejshilin, hein

Reviewed By: #plasma, hein

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D26582