Get rid of 'systemctl preset <service>' lines in %post of nvidia-video-G06/nvidia-compute-G06 packages

[sndirsch]

For some reason on SUSE it's not sufficient to just add systemd preset files to enable a service. It's not getting enabled, not even after reboot. %systemd_post <service> in %post doesn't help either. Instead systemctl preset <service> is needed. Hopefully we can get rid of this workaround in the future. This is related to PR #50,

[sndirsch]

@scaronni-nvidia JFYI ...

[scaronni]

Bummer, adding all of that to the SPEC file kinda defeats the purpose of using a simple systemd preset...

I've made more tests on an opensuse VM, without the lines it seems the results are not really consistent, sometimes the services are not started, in some other cases (apparently random) they are.

[sndirsch]

@scaronni Thanks for trying so hard. For now it's lower priority than the other open issues though. We may still find a solution until release of 570 next year.