**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 partition_id = getPartitionIDFromQuery(partition, query_context);
    
    DataPartsVector src_all_parts = src_data.getDataPartsVectorInPartition(MergeTreeDataPartState::Committed, partition_id);
    DataPartsVector src_parts;
    MutableDataPartsVector dst_parts;
    Strings block_id_paths;
    Strings part_checksums;
    auto zookeeper = getZooKeeper();
    std::vector<EphemeralLockInZooKeeper> ephemeral_locks;
    LOG_DEBUG(log, "Cloning {} parts", src_all_parts.size());
    static const String TMP_PREFIX = "tmp_replace_from_";
    String alter_partition_version_path = zookeeper_path + "/alter_partition_version";
    Coordination::Stat alter_partition_version_stat;
    zookeeper->get(alter_partition_version_path, &alter_partition_version_stat);
    
    
    
    
    MergeTreePartInfo drop_range;
    std::optional<EphemeralLockInZooKeeper> delimiting_block_lock;
    bool partition_was_empty = !getFakePartCoveringAllPartsInPartition(partition_id, drop_range, delimiting_block_lock, true);
    if (replace && partition_was_empty)
    {
        
        LOG_INFO(log, "Partition {} was empty, REPLACE PARTITION will work as ATTACH PARTITION FROM", drop_range.partition_id);
        replace = false;
    }
    if (!replace)
    {