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_vmkernel.py

@@ -128,6 +128,7 @@ EXAMPLES = '''
         subnet_mask: 255.255.255.0
       state: present
       enable_mgmt: True
+   delegate_to: localhost
 
 -  name: Add Management vmkernel port using DHCP network type
    vmware_vmkernel:
@@ -141,6 +142,7 @@ EXAMPLES = '''
       network:
         type: 'dhcp'
       enable_mgmt: True
+   delegate_to: localhost
 
 -  name: Delete VMkernel port using DHCP network type
    vmware_vmkernel:
@@ -151,7 +153,7 @@ EXAMPLES = '''
       portgroup_name: PG_0002
       vlan_id: vlan_id
       state: absent
-
+   delegate_to: localhost
 '''
 
 RETURN = r'''