BigQuery supports clustering for both partitioned and non-partitioned tables.

Reference: [https://cloud.google.com/bigquery/docs/clustered-tables](https://cloud.google.com/bigquery/docs/clustered-tables)
airflow/providers/google/cloud/operators/bigquery.py
self,
        *,
        bucket: str,
        source_objects: List,
        destination_project_dataset_table: str,
        table_resource: Optional[Dict[str, Any]] = None,
        schema_fields: Optional[List] = None,
        schema_object: Optional[str] = None,
        source_format: str = 'CSV',
        compression: str = 'NONE',
        skip_leading_rows: int = 0,
        field_delimiter: str = ',',
        max_bad_records: int = 0,
        quote_character: Optional[str] = None,
        allow_quoted_newlines: bool = False,
        allow_jagged_rows: bool = False,
        bigquery_conn_id: str = 'google_cloud_default',
        google_cloud_storage_conn_id: str = 'google_cloud_default',
        delegate_to: Optional[str] = None,