Port all KRun::runService/runApplication to KIO/ApplicationLauncherJob

Summary: And use KNotificationJobUiDelegate in case of errors

Test Plan: Untested other than compilation

Reviewers: broulik, davidedmundson

Reviewed By: broulik

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D29124