**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.

throw Exception(ErrorCodes::DUPLICATE_DATA_PART, "Part {} already exists on replica {} on path {}", lost_part_name, replica, current_part_path);
                }
            }
            getCommitPartOps(ops, new_data_part);
            Coordination::Responses responses;
            if (auto code = zookeeper->tryMulti(ops, responses); code == Coordination::Error::ZOK)
            {
                transaction.commit();
                break;
            }
            else if (code == Coordination::Error::ZBADVERSION)
            {
                LOG_INFO(log, "Looks like new replica appearead while creating new empty part, will retry");
            }
            else
            {
                zkutil::KeeperMultiException::check(code, ops, responses);
            }
        }
    }
    catch (const Exception & ex)
    {
        LOG_WARNING(log, "Cannot commit empty part {} with error {}", lost_part_name, ex.displayText());
        return false;
    }
    LOG_INFO(log, "Created empty part {} instead of lost part", lost_part_name);
    return true;
}
}