**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.

{
    
    Int64 wait_for_inactive_timeout = query_context->getSettingsRef().replication_wait_for_inactive_replica_timeout;
    if (query_context->getSettingsRef().replication_alter_partitions_sync == 1)
    {
        bool finished = tryWaitForReplicaToProcessLogEntry(zookeeper_path, replica_name, entry, wait_for_inactive_timeout);
        if (!finished)
        {
            throw Exception(ErrorCodes::UNFINISHED, "{}Log entry {} is not precessed on local replica, "
                            "most likely because the replica was shut down.", error_context, entry.znode_name);
        }
    }
    else if (query_context->getSettingsRef().replication_alter_partitions_sync == 2)
    {
        waitForAllReplicasToProcessLogEntry(zookeeper_path, entry, wait_for_inactive_timeout, error_context);
    }
}
bool StorageReplicatedMergeTree::tryWaitForReplicaToProcessLogEntry(
    const String & table_zookeeper_path, const String & replica, const ReplicatedMergeTreeLogEntryData & entry, Int64 wait_for_inactive_timeout)
{
    String entry_str = entry.toString();
    String log_node_name;
    /** Wait for entries from `log` directory (a common log, from where replicas copy entries to their queue) to be processed.