Returns unique K3S bearer token

When using the K3S service, one might expect to get a list of bearer tokens instead of a unique one...

Code line

https://gitlab.inria.fr/discovery/enoslib/-/blob/main/enoslib/service/k3s/k3s.py#L119

Use case

k3s = en.K3s(master=roles['master'], agent=list()) # Here roles['master'] contains multiple hosts
k3s.depoy() # Returns a single bearer token

Possible fix?

What I went with to "fix" the issue on my side (would be nice to have it as the default behaviour)

    with actions(roles=roles['master'], gather_facts=False) as p:
        p.shell(
            f"export KUBECONFIG={KUBECONFIG_LOCATION_K3S} && kubectl -n kubernetes-dashboard describe secret admin-user-token | grep '^token'",  # noqa
            task_name="token",
        )
    env["k3s-token"] = [res.stdout for res in p.results.filter(task="token")]

Pretty much the same code already present in the service, but returning a list 😄