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

This will avoid SSH connection on the local host

roles/download/tasks/download_container.yml

@@ -25,6 +25,7 @@
       stat:
         path: "{{ image_path_cached }}"
       delegate_to: localhost
+      connection: local
       delegate_facts: no
       register: cache_image
       changed_when: false

roles/download/tasks/download_file.yml

@@ -25,6 +25,7 @@
       state: directory
       recurse: yes
     delegate_to: localhost
+    connection: local
     delegate_facts: false
     run_once: true
     become: false

roles/download/tasks/prep_download.yml

@@ -20,6 +20,7 @@
 - name: prep_download | On localhost, check if passwordless root is possible
   command: "true"
   delegate_to: localhost
+  connection: local
   run_once: true
   register: test_become
   changed_when: false
@@ -34,6 +35,7 @@
 - name: prep_download | On localhost, check if user has access to docker without using sudo
   shell: "{{ image_info_command_on_localhost }}"
   delegate_to: localhost
+  connection: local
   run_once: true
   register: test_docker
   changed_when: false
@@ -92,6 +94,7 @@
     recurse: yes
     mode: 0755
   delegate_to: localhost
+  connection: local
   delegate_facts: no
   run_once: true
   become: false