Fix: Ignore bigquery partition_by config when the target isn't bigquery

Author: crericha

sqlmesh/dbt/model.py

@@ -517,9 +517,11 @@ def to_sqlmesh(
                         raise ConfigError(
                             f"Failed to parse model '{self.canonical_name(context)}' partition_by field '{p}' in '{self.path}': {e}"
                         ) from e
-            else:
+            elif isinstance(self.partition_by, dict) and context.target.dialect == "bigquery":
                 partitioned_by.append(self._big_query_partition_by_expr(context))
-            optional_kwargs["partitioned_by"] = partitioned_by
+
+            if partitioned_by:
+                optional_kwargs["partitioned_by"] = partitioned_by
 
         if self.cluster_by:
             clustered_by = []