**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.

const ASTPtr & partition, bool move_part, const String & to, ContextPtr )
{
    
    if (!move_part)
        throw Exception("MOVE PARTITION TO SHARD is not supported, use MOVE PART instead", ErrorCodes::NOT_IMPLEMENTED);
    if (normalizeZooKeeperPath(zookeeper_path) == normalizeZooKeeperPath(to))
        throw Exception("Source and destination are the same", ErrorCodes::BAD_ARGUMENTS);
    auto zookeeper = getZooKeeper();
    String part_name = partition->as<ASTLiteral &>().value.safeGet<String>();
    auto part_info = MergeTreePartInfo::fromPartName(part_name, format_version);
    auto part = getPartIfExists(part_info, {MergeTreeDataPartState::Committed});