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/packaging/os/pkg5_publisher.py

@@ -33,34 +33,25 @@ options:
   state:
     description:
       - Whether to ensure that a publisher is present or absent.
-    required: false
     default: present
     choices: [ present, absent ]
   sticky:
     description:
       - Packages installed from a sticky repository can only receive updates
         from that repository.
-    required: false
-    default: null
-    choices: [ true, false ]
+    type: bool
   enabled:
     description:
       - Is the repository enabled or disabled?
-    required: false
-    default: null
-    choices: [ true, false ]
+    type: bool
   origin:
     description:
       - A path or URL to the repository.
       - Multiple values may be provided.
-    required: false
-    default: null
   mirror:
     description:
       - A path or URL to the repository mirror.
       - Multiple values may be provided.
-    required: false
-    default: null
 '''
 EXAMPLES = '''
 # Fetch packages for the solaris publisher direct from Oracle: