Use connection: local when delegate_to: localhost (#6322)

This will avoid SSH connection on the local host

roles/kubespray-defaults/tasks/fallback_ips_gather.yml

@@ -7,4 +7,5 @@
     gather_subset: '!all,network'
     filter: "ansible_default_ipv4"
   delegate_to: "{{ delegate_host_to_gather_facts }}"
+  connection: "{{ (delegate_host_to_gather_facts == 'localhost') | ternary('local', omit) }}"
   delegate_facts: yes