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_configuration.py

@@ -43,29 +43,20 @@ options:
   account:
     description:
       - Ensure the value for corresponding account.
-    required: false
-    default: null
   domain:
     description:
       - Domain the account is related to.
       - Only considered if C(account) is used.
-    required: false
     default: ROOT
   zone:
     description:
       - Ensure the value for corresponding zone.
-    required: false
-    default: null
   storage:
     description:
       - Ensure the value for corresponding storage pool.
-    required: false
-    default: null
   cluster:
     description:
       - Ensure the value for corresponding cluster.
-    required: false
-    default: null
 extends_documentation_fragment: cloudstack
 '''