**Describe the bug**
For DATABASE ENGINE Atomic (used by Default for all databases from 20.10) 
when try to `DROP TALBE replicatedmergetree table ON CLUSTER ... SYNC`, query failed after `distributed_ddl_task_timeout` seconds
`decrease `database_atomic_delay_before_drop_table_sec=1` and setup `database_atomic_wait_for_drop_and_detach_synchronously=1` for default user profile didn't help

**How to reproduce**
just look to https://gist.github.com/Slach/a7f2946a108883f6b1d5585b1b5b6b0d
```
bash -x ./reproduce.sh
```

* Which ClickHouse server version to use
Latest official docker build

* Non-default settings, if any
```
<yandex>
    <database_atomic_delay_before_drop_table_sec>1</database_atomic_delay_before_drop_table_sec>
    <profile>
        <default>
            <database_atomic_wait_for_drop_and_detach_synchronously>1</database_atomic_wait_for_drop_and_detach_synchronously>
            <distributed_ddl_task_timeout>20</distributed_ddl_task_timeout>
        </default>
    </profile>
</yandex>

```

**Expected behavior**
Successfull DROP TABLE on cluster

**Error message and/or stacktrace**
Code: 159. DB::Exception: Received from localhost:9000. DB::Exception: Watching task /clickhouse/task_queue/ddl/query-0000000001 is executing longer than distributed_ddl_task_timeout (=20) seconds. There are 2 unfinished hosts (0 of them are currently active), they are going to execute the query in background.

**Additional context**
table physically deleted, but Atomic engine doesn't return "finished" flag to Zookeeper `distributed_ddl` queue

```
docker-compose exec clickhouse-0-0-0 clickhouse-client -q "SELECT * FROM system.zookeeper WHERE path='/clickhouse/task_queue/ddl/query-0000000001/finished' FORMAT
Vertical"
```

returns empty result


auto [host, port] = Cluster::Address::fromString(host_id);
                if (status.code != 0 && first_exception == nullptr)
                    first_exception = std::make_unique<Exception>(status.code, "There was an error on [{}:{}]: {}", host, port, status.message);
                ++num_hosts_finished;
                columns[0]->insert(host);
                columns[1]->insert(port);
                columns[2]->insert(status.code);
                columns[3]->insert(status.message);
                columns[4]->insert(waiting_hosts.size() - num_hosts_finished);
                columns[5]->insert(current_active_hosts.size());
            }
            res = sample.cloneWithColumns(std::move(columns));
        }
        return res;
    }
    Block getSampleBlock() const
    {
        return sample.cloneEmpty();
    }
    ~DDLQueryStatusInputStream() override = default;
private:
    static Strings getChildrenAllowNoNode(const std::shared_ptr<zkutil::ZooKeeper> & zookeeper, const String & node_path)
    {
        Strings res;
        Coordination::Error code = zookeeper->tryGetChildren(node_path, res);
        if (code != Coordination::Error::ZOK && code != Coordination::Error::ZNONODE)
            throw Coordination::Exception(code, node_path);
        return res;
    }
    Strings getNewAndUpdate(const Strings & current_list_of_finished_hosts)