Fewer examples use connection: local in docs (#55133)

* Fewer connection: local lines in module examples and scenario guides

The line 'connection: local' is not required. See
./docs/docsite/rst/inventory/implicit_localhost.rst

docs/docsite/rst/scenario_guides/guide_aws.rst

@@ -18,7 +18,6 @@ Whereas classically ansible will execute tasks in its host loop against multiple
 In your playbook steps we'll typically be using the following pattern for provisioning steps::
 
     - hosts: localhost
-      connection: local
       gather_facts: False
       tasks:
         - ...
@@ -68,7 +67,6 @@ instance.::
     # demo_setup.yml
 
     - hosts: localhost
-      connection: local
       gather_facts: False
 
       tasks:
@@ -94,7 +92,6 @@ From this, we'll use the add_host module to dynamically create a host group cons
     # demo_setup.yml
 
     - hosts: localhost
-      connection: local
       gather_facts: False
 
       tasks:

docs/docsite/rst/scenario_guides/guide_gce.rst

@@ -88,7 +88,6 @@ you can use the following configuration:
 
    - name: Create IP address
      hosts: localhost
-     connection: local
      gather_facts: no
 
      vars:
@@ -169,7 +168,6 @@ rest.
    - name: Create an instance
      hosts: localhost
      gather_facts: no
-     connection: local
      vars:
          project: my-project
          auth_kind: serviceaccount