message: fix upgrade index info
diff: @@ -104,9 +104,9 @@ Status MetaDataUpgrade::rewriteIndexes(const folly::StringPiece &key,
  newItem.set_index_name(oldItem.get_index_name());
  cpp2::SchemaID schemaId;
  if (oldItem.get_schema_id().getType() == oldmeta::cpp2::SchemaID::Type::tag_id) {
  - schemaId.set_tag_id(oldItem.get_schema_id().getType());
  + schemaId.set_tag_id(oldItem.get_schema_id().get_tag_id());
  } else {
  - schemaId.set_edge_type(oldItem.get_schema_id().getType());
  + schemaId.set_edge_type(oldItem.get_schema_id().get_edge_type());
  }
  newItem.set_schema_id(schemaId);
  NG_LOG_AND_RETURN_IF_ERROR(convertToNewIndexColumns(oldItem.fields, newItem.fields));
  