add grants and grants_target_layer metadata migration

Author: newtonapple

sqlmesh/migrations/v0098_add_grants_and_grants_target_layer.py

@@ -0,0 +1,9 @@
+"""Add grants and grants_target_layer to incremental model metadata hash."""
+
+
+def migrate_schemas(state_sync, **kwargs):  # type: ignore
+    pass
+
+
+def migrate_rows(state_sync, **kwargs):  # type: ignore
+    pass