### Description

Add the ability to partition parquet files by columns. Right now you can partition files only by size.

### Use case/motivation

_No response_

### Related issues

_No response_

### Are you willing to submit a PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

],
        }
        mock_query.assert_called_once()
        mock_flush.assert_called_once()
        mock_upload.assert_called_once_with(
            BUCKET,
            FILENAME.format(0),
            TMP_FILE_NAME,
            mime_type="application/octet-stream",
            gzip=False,
            metadata=None,
        )
        mock_close.assert_called_once()
        
        cursor_mock.__iter__ = Mock(return_value=iter(INPUT_DATA))
        mock_convert_type.return_value = None
        operator = DummySQLToGCSOperator(
            sql=SQL,
            bucket=BUCKET,
            filename=FILENAME,
            task_id=TASK_ID,
            export_format="csv",
            null_marker="NULL",
        )
        result = operator.execute(context=dict())
        assert result == {
            "bucket": "TEST-BUCKET-1",
            "total_row_count": 3,
            "total_files": 1,
            "files": [{"file_name": "test_results_0.csv", "file_mime_type": "text/csv", "file_row_count": 3}],