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/cloud/rackspace/rax_queue.py

@@ -22,7 +22,6 @@ options:
   name:
     description:
       - Name to give the queue
-    default: null
   state:
     description:
       - Indicate desired state of the resource