We anyways already provide our own templates for system units and thus do not depend that much on the library functionality.

kardianos/service is not really maintained, there's e.g. a bug fix PR opened by myself on June 2023 which has not been merged.

I propose that we drop the whole dependency, use our own templates fully and provide needed wrappers around. We handle much of the same/similar logic in k0sctl/rig side already and thus known what needs to be done.