Fix: Don't pass a snapshot reference into the renderer when creating …

…a schema migration source

sqlmesh/core/snapshot/evaluator.py

@@ -675,7 +675,6 @@ def _create_snapshot(
  table_name=tmp_table_name,
  model=snapshot.model,
  is_table_deployable=False,
- snapshot=snapshot,
  table_mapping={snapshot.name: tmp_table_name},
  **create_render_kwargs,
  )