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/azure/azure_rm_functionapp_facts.py

@@ -24,20 +24,14 @@ options:
     name:
         description:
             - Only show results for a specific Function App
-        required: false
-        default: null
     resource_group:
         description:
             - Limit results to a resource group. Required when filtering by name
-        required: false
-        default: null
         aliases:
             - resource_group_name
     tags:
         description:
             - Limit results by providing a list of tags. Format tags as 'key' or 'key:value'.
-        required: false
-        default: null
 
 extends_documentation_fragment:
     - azure