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/xbps.py

@@ -28,12 +28,9 @@ options:
     name:
         description:
             - Name of the package to install, upgrade, or remove.
-        required: false
-        default: null
     state:
         description:
             - Desired state of the package.
-        required: false
         default: "present"
         choices: ["present", "absent", "latest"]
     recurse:
@@ -41,22 +38,19 @@ options:
             - When removing a package, also remove its dependencies, provided
               that they are not required by other packages and were not
               explicitly installed by a user.
-        required: false
-        default: no
-        choices: ["yes", "no"]
+        type: bool
+        default: 'no'
     update_cache:
         description:
             - Whether or not to refresh the master package lists. This can be
               run as part of a package installation or as a separate step.
-        required: false
-        default: yes
-        choices: ["yes", "no"]
+        type: bool
+        default: 'yes'
     upgrade:
         description:
             - Whether or not to upgrade whole system
-        required: false
-        default: no
-        choices: ["yes", "no"]
+        type: bool
+        default: 'no'
 '''
 
 EXAMPLES = '''