Fix callback._dump_results to dump vaulted data v2 (#39975)

lib/ansible/plugins/callback/__init__.py

@@ -26,6 +26,7 @@ import warnings
 from copy import deepcopy
 
 from ansible import constants as C
+from ansible.parsing.ajson import AnsibleJSONEncoder
 from ansible.plugins import AnsiblePlugin, get_plugin_class
 from ansible.module_utils._text import to_text
 from ansible.utils.color import stringc
@@ -122,7 +123,7 @@ class CallbackBase(AnsiblePlugin):
         if 'exception' in abridged_result:
             del abridged_result['exception']
 
-        return json.dumps(abridged_result, indent=indent, ensure_ascii=False, sort_keys=sort_keys)
+        return json.dumps(abridged_result, cls=AnsibleJSONEncoder, indent=indent, ensure_ascii=False, sort_keys=sort_keys)
 
     def _handle_warnings(self, res):
         ''' display warnings, if enabled and any exist in the result '''