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.
{
    DataPartsVector total_covered_parts;
    if (!isEmpty())
    {
        auto parts_lock = acquired_parts_lock ? MergeTreeData::DataPartsLock() : data.lockParts();
        auto * owing_parts_lock = acquired_parts_lock ? acquired_parts_lock : &parts_lock;
        auto current_time = time(nullptr);
        size_t add_bytes = 0;
        size_t add_rows = 0;
        size_t add_parts = 0;
        size_t reduce_bytes = 0;
        size_t reduce_rows = 0;
        size_t reduce_parts = 0;
        for (const DataPartPtr & part : precommitted_parts)
        {
            DataPartPtr covering_part;
            DataPartsVector covered_parts = data.getActivePartsToReplace(part->info, part->name, covering_part, *owing_parts_lock);
            if (covering_part)
            {
                LOG_WARNING(data.log, "Tried to commit obsolete part {} covered by {}", part->name, covering_part->getNameWithState());
                part->remove_time.store(0, std::memory_order_relaxed); /
                data.modifyPartState(part, DataPartState::Outdated);
            }
            else
            {
                total_covered_parts.insert(total_covered_parts.end(), covered_parts.begin(), covered_parts.end());
                for (const auto & covered_part : covered_parts)
                {