chore(types): fix typing for transport scopes

Author: daniel-sanche

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/base.py.j2

@@ -108,8 +108,6 @@ class {{ service.name }}Transport(abc.ABC):
         self._extended_operations_services: Dict[str, Any] = {}
         {% endif %}
 
-        scopes_kwargs = {"scopes": scopes, "default_scopes": self.AUTH_SCOPES}
-
         # Save the scopes.
         self._scopes = scopes
         if not hasattr(self, "_ignore_credentials"):
@@ -123,11 +121,12 @@ class {{ service.name }}Transport(abc.ABC):
         if credentials_file is not None:
             credentials, _ = google.auth.load_credentials_from_file(
                                 credentials_file,
-                                **scopes_kwargs,
-                                quota_project_id=quota_project_id
+                                scopes=scopes,
+                                quota_project_id=quota_project_id,
+                                default_scopes=self.AUTH_SCOPES,
                             )
         elif credentials is None and not self._ignore_credentials:
-            credentials, _ = google.auth.default(**scopes_kwargs, quota_project_id=quota_project_id)
+            credentials, _ = google.auth.default(scopes=scopes, quota_project_id=quota_project_id, default_scopes=self.AUTH_SCOPES)
             # Don't apply audience if the credentials file passed from user.
             if hasattr(credentials, "with_gdch_audience"):
                 credentials = credentials.with_gdch_audience(api_audience if api_audience else host)