**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.

if (!log_pointer.empty() && parse<UInt64>(log_pointer) > log_index)
                {
                    pulled_to_queue = true;
                    break;
                }
                
                
                
                
                if (!stop_waiting())
                    event->tryWait(event_wait_timeout_ms);
            } while (!stop_waiting());
            if (!pulled_to_queue)
                return false;
        }
    }
    else
    {
        throw Exception("Logical error: unexpected name of log node: " + entry.znode_name, ErrorCodes::LOGICAL_ERROR);
    }
    /** Second - find the corresponding entry in the queue of the specified replica.
      * Its number may not match the `log` node. Therefore, we search by comparing the content.
      */
    Strings queue_entries = getZooKeeper()->getChildren(fs::path(table_zookeeper_path) / "replicas" / replica / "queue");
    String queue_entry_to_wait_for;
    for (const String & entry_name : queue_entries)
    {
        String queue_entry_str;
        Coordination::Stat queue_entry_stat;
        bool exists = getZooKeeper()->tryGet(fs::path(table_zookeeper_path) / "replicas" / replica / "queue" / entry_name, queue_entry_str, &queue_entry_stat);