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_ip_interface.py

@@ -42,17 +42,12 @@ options:
     addr:
         description:
             - IPv4 or IPv6 Address.
-        required: false
-        default: null
     mask:
         description:
             - Subnet mask for IPv4 or IPv6 Address in decimal format.
-        required: false
-        default: null
     version:
         description:
             - IP address version.
-        required: false
         default: v4
         choices: ['v4','v6']
     ipv4_type:
@@ -61,13 +56,11 @@ options:
               The value is an enumerated type.
               main, primary IP address.
               sub, secondary IP address.
-        required: false
         default: main
         choices: ['main','sub']
     state:
         description:
             - Specify desired state of the resource.
-        required: false
         default: present
         choices: ['present','absent']
 '''