**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.

entry.new_part_name = getPartNamePossiblyFake(format_version, part->info);
        entry.detach = detach;
        entry.create_time = time(nullptr);
        ops.emplace_back(zkutil::makeCheckRequest(fs::path(zookeeper_path) / "log", merge_pred.getVersion())); 
        ops.emplace_back(zkutil::makeCreateRequest(fs::path(zookeeper_path) / "log/log-", entry.toString(), zkutil::CreateMode::PersistentSequential));
        
        ops.emplace_back(zkutil::makeSetRequest(fs::path(zookeeper_path) / "log", "", -1));
        Coordination::Responses responses;
        Coordination::Error rc = zookeeper->tryMulti(ops, responses);
        if (rc == Coordination::Error::ZBADVERSION)
        {
            LOG_TRACE(log, "A new log entry appeared while trying to commit DROP RANGE. Retry.");
            continue;
        }
        else if (rc == Coordination::Error::ZNONODE)
        {
            LOG_TRACE(log, "Other replica already removing same part {} or part deduplication node was removed by background thread. Retry.", part_name);
            continue;
        }
        else
            zkutil::KeeperMultiException::check(rc, ops, responses);
        String log_znode_path = dynamic_cast<const Coordination::CreateResponse &>(*responses[clear_block_ops_size + 1]).path_created;
        entry.znode_name = log_znode_path.substr(log_znode_path.find_last_of('/') + 1);
        return true;
    }
}
bool StorageReplicatedMergeTree::dropAllPartsInPartition(