Change nerdctl snapshotter to overlayfs by default (#9979)

roles/container-engine/nerdctl/templates/nerdctl.toml.j2

@@ -2,7 +2,7 @@ debug             = false
 debug_full        = false
 address           = "{{ cri_socket }}"
 namespace         = "k8s.io"
-snapshotter       = "native"
+snapshotter       = "{{ nerdctl_snapshotter | default('overlayfs') }}"
 cni_path          = "/opt/cni/bin"
 cni_netconfpath   = "/etc/cni/net.d"
 cgroup_manager    = "{{ kubelet_cgroup_driver | default('systemd') }}"