**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.

part_info = MergeTreePartInfo(partition_id, left, right, MergeTreePartInfo::MAX_LEVEL, mutation_version);
        return right != 0;
    }
    
    if (right == 0)
        return false;
    --right;
    
    part_info = MergeTreePartInfo(partition_id, left, right, MergeTreePartInfo::MAX_LEVEL, mutation_version);
    return true;
}
void StorageReplicatedMergeTree::restoreMetadataInZooKeeper()
{
    LOG_INFO(log, "Restoring replica metadata");
    if (!is_readonly || has_metadata_in_zookeeper)
        throw Exception(ErrorCodes::LOGICAL_ERROR, "It's a bug: replica is not readonly");
    if (are_restoring_replica.exchange(true))
        throw Exception(ErrorCodes::CONCURRENT_ACCESS_NOT_SUPPORTED, "Replica restoration in progress");
    auto metadata_snapshot = getInMemoryMetadataPtr();
    const DataPartsVector all_parts = getAllDataPartsVector();
    Strings active_parts_names;
    
    
    
    for (const auto & part : all_parts)
    {