Create registry client after credential_scopes are added to kwargs (Azure#29364)

Author: elesel

sdk/ml/azure-ai-ml/CHANGELOG.md

@@ -8,6 +8,8 @@
 
 ### Bugs Fixed
 
+- Fixed an issue affecting authentication to registry-related services in sovereign regions.
+
 ### Breaking Changes
 
 ### Other Changes

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

@@ -216,6 +216,9 @@ def __init__(
             )
         module_logger.debug("Cloud configured in MLClient: '%s'.", cloud_name)
 
+        # Add cloud information to kwargs
+        kwargs.update(_get_cloud_information_from_metadata(cloud_name))
+
         # registry_name is present when the operations need referring assets from registry.
         # the subscription, resource group, if provided, will be ignored and replaced by
         # whatever is received from the registry discovery service.
@@ -248,7 +251,6 @@ def __init__(
 
         base_url = _get_base_url_from_metadata(cloud_name=cloud_name, is_local_mfe=True)
         self._base_url = base_url
-        kwargs.update(_get_cloud_information_from_metadata(cloud_name))
         self._kwargs = kwargs
 
         self._operation_container = OperationsContainer()