@Override
  public void write(PositionDelete<T> payload) {
    delete(payload.path(), payload.pos());
  }
Positional delete file writer for iceberg tables. Write to different delete file for every data
file. The output delete files are named with pattern:
{data_file_name}-delete-{delete_file_suffix}.

@param <T> to indicate the record data type.
amoro-format-iceberg/src/main/java/org/apache/amoro/io/writer/MixedTreeNodePosDeleteWriter.java