@Override
  public void dropColumn(
      ConnectorSession session, ConnectorTableHandle tableHandle, ColumnHandle column) {
    IcebergColumnHandle handle = (IcebergColumnHandle) column;
    Table icebergTable =
        loadTable(session, ((IcebergTableHandle) tableHandle).getSchemaTableName());
    icebergTable.updateSchema().deleteColumn(handle.getName()).commit();
  }
Iceberg original metadata has some problems for mixed-format table, such as iceberg version,
table type. So copy from IcebergMetadata and made some change
amoro-format-mixed/amoro-mixed-trino/src/main/java/org/apache/amoro/trino/unkeyed/IcebergMetadata.java