**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.

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    if (client_info.client_trace_context.trace_id != UUID())
    {
        
        
        query_trace_context = client_info.client_trace_context;
        query_trace_context.span_id = thread_local_rng();
    }
    else if (client_info.query_kind == ClientInfo::QueryKind::INITIAL_QUERY)
    {
        
        
        std::bernoulli_distribution should_start_trace{
            settings.opentelemetry_start_trace_probability};
        if (should_start_trace(thread_local_rng))
        {
            
            query_trace_context.trace_id = random.uuid;
            query_trace_context.span_id = thread_local_rng();
            
            query_trace_context.trace_flags = 1;
        }
    }
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    if (query_id_to_set.empty())    
    {
        
        struct QueryUUID : Poco::UUID
        {
            QueryUUID(const char * bytes, Poco::UUID::Version version)