**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.

{
    fs::directory_iterator dir_end;
    for (const std::string & path : getDataPaths())
    {
        for (fs::directory_iterator dir_it{fs::path(path) / "detached/"}; dir_it != dir_end; ++dir_it)
        {
            const String file_name = dir_it->path().filename().string();
            auto part_info = MergeTreePartInfo::tryParsePartName(file_name, format_version);
            if (part_info && part_info->partition_id == partition_name)
                return true;
        }
    }
    return false;
}
bool StorageReplicatedMergeTree::createEmptyPartInsteadOfLost(zkutil::ZooKeeperPtr zookeeper, const String & lost_part_name)
{
    LOG_INFO(log, "Going to replace lost part {} with empty part", lost_part_name);
    auto metadata_snapshot = getInMemoryMetadataPtr();
    auto settings = getSettings();
    constexpr static auto TMP_PREFIX = "tmp_empty_";
    auto new_part_info = MergeTreePartInfo::fromPartName(lost_part_name, format_version);
    auto block = metadata_snapshot->getSampleBlock();
    DB::IMergeTreeDataPart::TTLInfos move_ttl_infos;
    NamesAndTypesList columns = metadata_snapshot->getColumns().getAllPhysical().filter(block.getNames());