message: remove random shuffle before merge
diff: @@ -1763,7 +1763,7 @@ void PhysicalOrder::ScheduleMergeTasks(Pipeline &pipeline, ClientContext &contex
  return;
  }
  - std::random_shuffle(state.sorted_blocks.begin(), state.sorted_blocks.end());
  + // uneven amount of blocks
  if (state.sorted_blocks.size() % 2 == 1) {
  state.sorted_blocks_temp.push_back(move(state.sorted_blocks.back()));
  state.sorted_blocks.pop_back();
  