Fix online deployment registry issue (Azure#37857)

* fix service client subscription id

Author: PratibhaShrivastav18

sdk/ml/azure-ai-ml/azure/ai/ml/_ml_client.py

@@ -372,7 +372,11 @@ def __init__(
 
         self._service_client_07_2024_preview = ServiceClient072024Preview(
             credential=self._credential,
-            subscription_id=self._operation_scope._subscription_id,
+            subscription_id=(
+                self._ws_operation_scope._subscription_id
+                if registry_reference
+                else self._operation_scope._subscription_id
+            ),
             base_url=base_url,
             **kwargs,
         )