Match test not run due to executable not found to jenkins <failure>.

This will ensure that should test executables not be found, we will flag them as failures for further investigation rather than silently ignoring them.

Differential Revision: https://phabricator.kde.org/D20874
Status Job ID Name Coverage
  Build
manual #4514
docker allowed to fail manual
kdeorg/appimage-base
manual #4515
docker allowed to fail manual
kdeorg/staticweb