Clean up module documentation (#36909)

* Clean up module documentation

This PR includes:
- Removal of `default: None` (and variations)
- Removal of `required: false`
- Fixing booleans and `type: bool` where required

* Fix remaining (new) validation issues

lib/ansible/modules/network/cloudengine/ce_interface.py

@@ -35,13 +35,9 @@ options:
     interface:
         description:
             - Full name of interface, i.e. 40GE1/0/10, Tunnel1.
-        required: false
-        default: null
     interface_type:
         description:
             - Interface type to be configured from the device.
-        required: false
-        default: null
         choices: ['ge', '10ge', '25ge', '4x10ge', '40ge', '100ge', 'vlanif', 'loopback', 'meth',
                   'eth-trunk', 'nve', 'tunnel', 'ethernet', 'fcoe-port', 'fabric-port', 'stack-port', 'null']
     admin_state:
@@ -50,31 +46,24 @@ options:
               The value is an enumerated type.
               up, An interface is in the administrative Up state.
               down, An interface is in the administrative Down state.
-        required: false
-        default: null
         choices: ['up', 'down']
     description:
         description:
             - Specifies an interface description.
               The value is a string of 1 to 242 case-sensitive characters,
               spaces supported but question marks (?) not supported.
-        required: false
-        default: null
     mode:
         description:
             - Manage Layer 2 or Layer 3 state of the interface.
-        required: false
-        default: null
         choices: ['layer2', 'layer3']
     l2sub:
         description:
             - Specifies whether the interface is a Layer 2 sub-interface.
-        required: false
-        default: false
+        type: bool
+        default: 'no'
     state:
         description:
             - Specify desired state of the resource.
-        required: true
         default: present
         choices: ['present', 'absent', 'default']
 '''