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.
for (const auto & disk_ptr : disks)
    {
        if (disk_ptr->isBroken())
            continue;
        auto & disk_parts = disk_part_map[disk_ptr->getName()];
        auto & disk_wal_parts = disk_wal_part_map[disk_ptr->getName()];
        pool.scheduleOrThrowOnError([&, disk_ptr]()
        {
            for (auto it = disk_ptr->iterateDirectory(relative_data_path); it->isValid(); it->next())
            {
                
                if (startsWith(it->name(), "tmp") || it->name() == MergeTreeData::FORMAT_VERSION_FILE_NAME
                    || it->name() == MergeTreeData::DETACHED_DIR_NAME)
                    continue;
                if (!startsWith(it->name(), MergeTreeWriteAheadLog::WAL_FILE_NAME))
                    disk_parts.emplace_back(std::make_pair(it->name(), disk_ptr));
                else if (it->name() == MergeTreeWriteAheadLog::DEFAULT_WAL_FILE_NAME && settings->in_memory_parts_enable_wal)
                {
                    std::unique_lock lock(wal_init_lock);
                    if (write_ahead_log != nullptr)
                        throw Exception(
                            "There are multiple WAL files appeared in current storage policy. You need to resolve this manually",
                            ErrorCodes::CORRUPTED_DATA);
                    write_ahead_log = std::make_shared<MergeTreeWriteAheadLog>(*this, disk_ptr, it->name());
                    for (auto && part : write_ahead_log->restore(metadata_snapshot, getContext()))
                        disk_wal_parts.push_back(std::move(part));
                }
                else if (settings->in_memory_parts_enable_wal)
                {
                    MergeTreeWriteAheadLog wal(*this, disk_ptr, it->name());