For some reasons when we delete a MergeTree Part in atomic way something may go wrong - and leave the `delete_tmp_*` folder or it's part on disk. This may lead to a disk space consumption over time.

It's suggested to delete this folders at least at server start-up. Current solution with `clearOldTemporaryDirectories()` doesn't work because this method is called periodically from a thread without any locks or advisory on folders - it may cause the race conditions.
log_node_name = entry.znode_name;
        LOG_DEBUG(log, "Waiting for {} to pull {} to queue", replica, log_node_name);
        
        bool pulled_to_queue = false;
        do
        {
            zkutil::EventPtr event = std::make_shared<Poco::Event>();
            String log_pointer = getZooKeeper()->get(fs::path(table_zookeeper_path) / "replicas" / replica / "log_pointer", nullptr, event);
            if (!log_pointer.empty() && parse<UInt64>(log_pointer) > log_index)
            {
                pulled_to_queue = true;
                break;
            }
            
            
            
            
            if (!stop_waiting())
                event->tryWait(event_wait_timeout_ms);
        } while (!stop_waiting());
        if (!pulled_to_queue)
            return false;
        LOG_DEBUG(log, "Looking for node corresponding to {} in {} queue", log_node_name, replica);
    }
    else if (!entry.log_entry_id.empty())
    {
        
        
        
        LOG_DEBUG(log, "Looking for log entry with id `{}` in the log", entry.log_entry_id);