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_vlan.py

@@ -32,27 +32,18 @@ options:
     vlan_id:
         description:
             - Single VLAN ID, in the range from 1 to 4094.
-        required: false
-        default: null
     vlan_range:
         description:
             - Range of VLANs such as C(2-10) or C(2,5,10-15), etc.
-        required: false
-        default: null
     name:
         description:
             - Name of VLAN, in the range from 1 to 31.
-        required: false
-        default: null
     description:
         description:
             - Specify VLAN description, in the range from 1 to 80.
-        required: false
-        default: null
     state:
         description:
             - Manage the state of the resource.
-        required: false
         default: present
         choices: ['present','absent']
 '''