Fix all VMware examples to use delegate_to (#43426)

Some users have problems using the VMware modules because they use the
vCenter as target, and Ansible uses SSH to connect to the targets.

Eventually we need to update the VMware guide to explain how the modules
work, but the first fix is to update the examples.

(We should backport to v2.6 and v2.5 too)

lib/ansible/modules/cloud/vmware/vmware_dvs_portgroup.py

@@ -151,6 +151,7 @@ EXAMPLES = '''
         num_ports: 120
         portgroup_type: earlyBinding
         state: present
+     delegate_to: localhost
 
    - name: Create vlan trunk portgroup
      connection: local
@@ -165,6 +166,7 @@ EXAMPLES = '''
         num_ports: 120
         portgroup_type: earlyBinding
         state: present
+     delegate_to: localhost
 
    - name: Create no-vlan portgroup
      connection: local
@@ -178,6 +180,7 @@ EXAMPLES = '''
         num_ports: 120
         portgroup_type: earlyBinding
         state: present
+     delegate_to: localhost
 
    - name: Create vlan portgroup with all security and port policies
      connection: local
@@ -207,6 +210,7 @@ EXAMPLES = '''
           uplink_teaming_override: yes
           vendor_config_override: yes
           vlan_override: yes
+     delegate_to: localhost
 '''
 
 try: