**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.

String full_path = new_data_part->getFullRelativePath();
        if (new_data_part->volume->getDisk()->exists(full_path))
        {
            LOG_WARNING(log, "Removing old temporary directory {}", fullPath(new_data_part->volume->getDisk(), full_path));
            new_data_part->volume->getDisk()->removeRecursive(full_path);
        }
        const auto disk = new_data_part->volume->getDisk();
        disk->createDirectories(full_path);
        if (getSettings()->fsync_part_directory)
            sync_guard = disk->getDirectorySyncGuard(full_path);
    }
    
    
    auto compression_codec = getContext()->chooseCompressionCodec(0, 0);
    const auto & index_factory = MergeTreeIndexFactory::instance();
    MergedBlockOutputStream out(new_data_part, metadata_snapshot, columns, index_factory.getMany(metadata_snapshot->getSecondaryIndices()), compression_codec);
    bool sync_on_insert = settings->fsync_after_insert;
    out.write(block);
    
    
    
    out.writeSuffixAndFinalizePart(new_data_part, sync_on_insert);
    try
    {
        MergeTreeData::Transaction transaction(*this);
        auto replaced_parts = renameTempPartAndReplace(new_data_part, nullptr, &transaction);
        if (!replaced_parts.empty())
        {
            Strings part_names;
            for (const auto & part : replaced_parts)