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/cloudstack/cs_account.py

@@ -40,65 +40,48 @@ options:
     description:
       - Username of the user to be created if account did not exist.
       - Required on C(state=present).
-    required: false
-    default: null
   password:
     description:
       - Password of the user to be created if account did not exist.
       - Required on C(state=present).
-    required: false
-    default: null
   first_name:
     description:
       - First name of the user to be created if account did not exist.
       - Required on C(state=present).
-    required: false
-    default: null
   last_name:
     description:
       - Last name of the user to be created if account did not exist.
       - Required on C(state=present).
-    required: false
-    default: null
   email:
     description:
       - Email of the user to be created if account did not exist.
       - Required on C(state=present).
-    required: false
-    default: null
   timezone:
     description:
       - Timezone of the user to be created if account did not exist.
-    required: false
-    default: null
   network_domain:
     description:
       - Network domain of the account.
-    required: false
-    default: null
   account_type:
     description:
       - Type of the account.
-    required: false
     default: 'user'
     choices: [ 'user', 'root_admin', 'domain_admin' ]
   domain:
     description:
       - Domain the account is related to.
-    required: false
     default: 'ROOT'
   state:
     description:
       - State of the account.
       - C(unlocked) is an alias for C(enabled).
-    required: false
     default: 'present'
     choices: [ 'present', 'absent', 'enabled', 'disabled', 'locked', 'unlocked' ]
   poll_async:
     description:
       - Poll async jobs until job has finished.
-    required: false
-    default: true
+    type: bool
+    default: 'yes'
 extends_documentation_fragment: cloudstack
 '''