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

This will avoid SSH connection on the local host

roles/kubernetes/preinstall/tasks/0030-pre_upgrade.yml

@@ -3,6 +3,7 @@
   stat:
     path: "{{ inventory_dir }}/../credentials"
   delegate_to: localhost
+  connection: local
   register: old_credential_dir
   become: no
 
@@ -10,6 +11,7 @@
   stat:
     path: "{{ inventory_dir }}/credentials"
   delegate_to: localhost
+  connection: local
   register: new_credential_dir
   become: no
   when: old_credential_dir.stat.exists
@@ -19,6 +21,7 @@
   args:
     creates: "{{ inventory_dir }}/credentials"
   delegate_to: localhost
+  connection: local
   become: no
   when:
     - old_credential_dir.stat.exists