Fixed #35238 -- Fixed database serialization crash when base managers use prefetch_related().

Regression in 1391356276
following deprecation in eedbf930287cb72e9afab1f7208c24b1146b0c4ec.

django/db/backends/base/creation.py

@@ -135,7 +135,10 @@ class BaseDatabaseCreation:
                             queryset = model._base_manager.using(
                                 self.connection.alias,
                             ).order_by(model._meta.pk.name)
-                            yield from queryset.iterator()
+                            chunk_size = (
+                                2000 if queryset._prefetch_related_lookups else None
+                            )
+                            yield from queryset.iterator(chunk_size=chunk_size)
 
         # Serialize to a string
         out = StringIO()