As detailed in https://github.com/k3s-io/k3s-ansible/issues/295, this
commit fixes the issue that if `kubeconfig` is set to anything other
than the defaults value, then:
- `~/.kube/config` is modified.
- No file at `{{ kubeconfig }}` is created.
- Any existing file and `{{ kubeconfig }}` is deleted.
Signed-off-by: Nick To <nick@nickto.net>
