Adjust install targets of systemd service and timer

[kalikiana]

See: https://progress.opensuse.org/issues/166433

[okurz]

@kalikiana @Martchus is this still needed? I don't see a good justification, just "adjust". So … is this a fix, correction, improvement?

[Martchus]

I think both changes make sense and that's also what we have in similar units. (I've just checked all timers and their service files in the openQA repo.)

[Martchus]

This makes sense according to https://man.archlinux.org/man/systemd.special.7. We also use this in other timer-triggered units in openQA.

[Martchus]

This means one can no longer enable this unit normally, e.g. to run the triggering just once after boot. I guess this makes sense for this timer-triggered unit. We also don't have this for other timer-triggered units in openQA.

[kalikiana]

@kalikiana @Martchus is this still needed? I don't see a good justification, just "adjust". So … is this a fix, correction, improvement?

This refers to a comment on #268 after merging. Somehow the follow-up got lost, so thank you for catching that!