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/openstack/os_ironic_node.py

@@ -33,26 +33,20 @@ options:
        - Indicates if the resource should be deployed. Allows for deployment
          logic to be disengaged and control of the node power or maintenance
          state to be changed.
-      choices: ['true', 'false']
-      default: true
+      type: bool
+      default: 'yes'
     uuid:
       description:
         - globally unique identifier (UUID) to be given to the resource.
-      required: false
-      default: None
     ironic_url:
       description:
         - If noauth mode is utilized, this is required to be set to the
           endpoint URL for the Ironic API.  Use with "auth" and "auth_type"
           settings set to None.
-      required: false
-      default: None
     config_drive:
       description:
         - A configdrive file or HTTP(S) URL that will be passed along to the
           node.
-      required: false
-      default: None
     instance_info:
       description:
         - Definition of the instance information which is used to deploy
@@ -79,20 +73,18 @@ options:
       description:
         - A setting to allow the direct control if a node is in
           maintenance mode.
-      required: false
-      default: false
+      type: bool
+      default: 'no'
     maintenance_reason:
       description:
         - A string expression regarding the reason a node is in a
           maintenance mode.
-      required: false
-      default: None
     wait:
       description:
         - A boolean value instructing the module to wait for node
           activation or deactivation to complete before returning.
-      required: false
-      default: False
+      type: bool
+      default: 'no'
       version_added: "2.1"
     timeout:
       description:
@@ -102,7 +94,6 @@ options:
     availability_zone:
       description:
         - Ignored. Present for backwards compatibility
-      required: false
 '''
 
 EXAMPLES = '''