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/web_infrastructure/ansible_tower/tower_team.py

@@ -27,18 +27,15 @@ options:
       description:
         - Name to use for the team.
       required: True
-      default: null
     organization:
       description:
         - Organization the team should be made a member of.
       required: True
-      default: null
     state:
       description:
         - Desired state of the resource.
-      required: False
-      default: "present"
       choices: ["present", "absent"]
+      default: "present"
 extends_documentation_fragment: tower
 '''