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.
{
            if (move_ttl_entry->destination_type == DataDestinationType::VOLUME && !move_ttl_entry->if_exists)
                LOG_WARNING(log, "Would like to reserve space on volume '{}' by TTL rule of table '{}' but volume was not found or rule is not applicable at the moment",
                    move_ttl_entry->destination_name, log_name);
            else if (move_ttl_entry->destination_type == DataDestinationType::DISK && !move_ttl_entry->if_exists)
                LOG_WARNING(log, "Would like to reserve space on disk '{}' by TTL rule of table '{}' but disk was not found or rule is not applicable at the moment",
                    move_ttl_entry->destination_name, log_name);
        }
        else
        {
            reservation = destination_ptr->reserve(expected_size);
            if (reservation)
                return reservation;
            else
                if (move_ttl_entry->destination_type == DataDestinationType::VOLUME)
                    LOG_WARNING(log, "Would like to reserve space on volume '{}' by TTL rule of table '{}' but there is not enough space",
                    move_ttl_entry->destination_name, log_name);
                else if (move_ttl_entry->destination_type == DataDestinationType::DISK)
                    LOG_WARNING(log, "Would like to reserve space on disk '{}' by TTL rule of table '{}' but there is not enough space",
                        move_ttl_entry->destination_name, log_name);
        }
    }
    /
    if (selected_disk)
        reservation = selected_disk->reserve(expected_size);
    if (!reservation)
        reservation = getStoragePolicy()->reserve(expected_size, min_volume_index);
    return reservation;
}
SpacePtr MergeTreeData::getDestinationForMoveTTL(const TTLDescription & move_ttl, bool is_insert) const