Fix etcdctl.sh TLS file path when not using kubeadm. (#10467)

roles/etcdctl_etcdutl/templates/etcdctl.sh.j2

@@ -8,7 +8,7 @@ etcdctl \
   --cert {{ kube_cert_dir }}/etcd/server.crt \
   --key {{ kube_cert_dir }}/etcd/server.key "$@"
 {% else %}
-  --cacert {{ etcd_cert_dir }}/etcd/ca.crt \
-  --cert {{ etcd_cert_dir }}/etcd/server.crt \
-  --key {{ etcd_cert_dir }}/etcd/server.key "$@"
+  --cacert {{ etcd_cert_dir }}/ca.pem \
+  --cert {{ etcd_cert_dir }}/admin-{{ inventory_hostname }}.pem \
+  --key {{ etcd_cert_dir }}/admin-{{ inventory_hostname }}-key.pem "$@"
 {% endif %}