[Kubernetes plugin] add Pod template option to load all user env vars, groups, etc... from worker machine

We have created several K8s pod templates with different labels, each one uses a different userID

every time the user env change in the network (i.e. user is added/removed from group, env vars are modified, etc.) we need to manually maintain our pod templates definitions

It would be great if someone could add a checkbox so when setting the userID in the pod template all the environment would be loaded from network