remove kubelet startup warnings for non docker container runtime (#6605)

Removes these startup warnings:

Warning: For remote container runtime, --pod-infra-container-image is ignored in kubelet, which should be set in that remote runtime instead
Using "/var/run/crio/crio.sock" as endpoint is deprecated, please consider using full url format "unix:///var/run/crio/crio.sock".

roles/kubernetes/node/templates/kubelet.env.v1beta1.j2

@@ -12,10 +12,11 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
 --config={{ kube_config_dir }}/kubelet-config.yaml \
 --kubeconfig={{ kube_config_dir }}/kubelet.conf \
 {# end kubeadm specific settings #}
+{% if container_manager == 'docker' %}
 --pod-infra-container-image={{ pod_infra_image_repo }}:{{ pod_infra_image_tag }} \
-{% if container_manager != 'docker' %}
+{% else %}
 --container-runtime=remote \
---container-runtime-endpoint={{ cri_socket }} \
+--container-runtime-endpoint=unix://{{ cri_socket }} \
 {% endif %}
 {% if dynamic_kubelet_configuration %}
 --dynamic-config-dir={{ dynamic_kubelet_configuration_dir }} \