Switch frontend to use json helper (#73874)

homeassistant/helpers/json.py

@@ -87,6 +87,15 @@ def json_dumps(data: Any) -> str:
     ).decode("utf-8")
 
 
+def json_dumps_sorted(data: Any) -> str:
+    """Dump json string with keys sorted."""
+    return orjson.dumps(
+        data,
+        option=orjson.OPT_NON_STR_KEYS | orjson.OPT_SORT_KEYS,
+        default=json_encoder_default,
+    ).decode("utf-8")
+
+
 json_loads = orjson.loads