**Describe the issue**
ClickHouse is unable to start up after upgrading from 20.8 to 21.8. 

There is a replicated table with `:` in zk path and it couldn't be loaded with:

`2021.09.15 03:49:58.435071 [ 633075 ] {} <Error> Application: DB::Exception: Unknown auxiliary ZooKeeper name '/test_prefix'. If it's required it can be added to the section <auxiliary_zookeepers> in config.xml: Cannot attach table `db1`.`table1` from metadata file /var/lib/clickhouse/metadata/db1/table1.sql from query ATTACH TABLE db1.table1 (`field1` String, `date` Date) ENGINE = ReplicatedMergeTree('/test_prefix:db1/{shard}/table1', '{replica}') PARTITION BY toMonth(date) PRIMARY KEY field1 ORDER BY field1 SETTINGS index_granularity = 8192: while loading database `db1` from path /var/lib/clickhouse/metadata/db1
`

**Expected behavior**
ClickHouse server is able to startup after upgrade without schema change. "test_prefix" in "/test_prefix:db1/{shard}/table1" is not interpreted as an auxiliary ZooKeeper name.

if (!is_parallel)
            {
                Coordination::Stat added_parts_stat;
                String old_added_parts = zookeeper->get(quorum_last_part_path, &added_parts_stat);
                ReplicatedMergeTreeQuorumAddedParts parts_with_quorum(format_version);
                if (!old_added_parts.empty())
                    parts_with_quorum.fromString(old_added_parts);
                auto part_info = MergeTreePartInfo::fromPartName(part_name, format_version);
                
                parts_with_quorum.added_parts[part_info.partition_id] = part_name;
                String new_added_parts = parts_with_quorum.toString();
                ops.emplace_back(zkutil::makeRemoveRequest(quorum_status_path, stat.version));
                ops.emplace_back(zkutil::makeSetRequest(quorum_last_part_path, new_added_parts, added_parts_stat.version));
            }
            else
                ops.emplace_back(zkutil::makeRemoveRequest(quorum_status_path, stat.version));
            auto code = zookeeper->tryMulti(ops, responses);
            if (code == Coordination::Error::ZOK)
            {
                break;
            }
            else if (code == Coordination::Error::ZNONODE)
            {
                
                break;
            }
            else if (code == Coordination::Error::ZBADVERSION)
            {
                
                continue;