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/webfaction/webfaction_site.py

@@ -41,7 +41,6 @@ options:
     state:
         description:
             - Whether the website should exist
-        required: false
         choices: ['present', 'absent']
         default: "present"
 
@@ -54,18 +53,16 @@ options:
         description:
             - Whether or not to use HTTPS
         type: bool
-        default: 'false'
+        default: 'no'
 
     site_apps:
         description:
             - A mapping of URLs to apps
-        required: false
         default: []
 
     subdomains:
         description:
             - A list of subdomains associated with this site.
-        required: false
         default: []
 
     login_name: