**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.

for (const auto & src_part : src_all_parts)
    {
        if (!dest_table_storage->canReplacePartition(src_part))
            throw Exception(
                "Cannot move partition '" + partition_id + "' because part '" + src_part->name + "' has inconsistent granularity with table",
                ErrorCodes::LOGICAL_ERROR);
        String hash_hex = src_part->checksums.getTotalChecksumHex();
        String block_id_path;
        auto lock = dest_table_storage->allocateBlockNumber(partition_id, zookeeper, block_id_path);
        if (!lock)
        {
            LOG_INFO(log, "Part {} (hash {}) has been already attached", src_part->name, hash_hex);
            continue;
        }
        UInt64 index = lock->getNumber();
        MergeTreePartInfo dst_part_info(partition_id, index, index, src_part->info.level);
        auto dst_part = dest_table_storage->cloneAndLoadDataPartOnSameDisk(src_part, TMP_PREFIX, dst_part_info, dest_metadata_snapshot);
        src_parts.emplace_back(src_part);
        dst_parts.emplace_back(dst_part);
        ephemeral_locks.emplace_back(std::move(*lock));
        block_id_paths.emplace_back(block_id_path);
        part_checksums.emplace_back(hash_hex);
    }
    ReplicatedMergeTreeLogEntryData entry_delete;
    {
        entry_delete.type = LogEntry::DROP_RANGE;
        entry_delete.source_replica = replica_name;
        entry_delete.new_part_name = drop_range_fake_part_name;
        entry_delete.detach = false; 
        entry_delete.create_time = time(nullptr);