**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 (!drop_range_info.isFakeDropRangePart())
                LOG_INFO(log, "Log entry {} tried to drop single part {}, but part does not exist", entry.znode_name, entry.new_part_name);
            return;
        }
    }
    if (entry.detach)
        LOG_DEBUG(log, "Detaching parts.");
    else
        LOG_DEBUG(log, "Removing parts.");
    if (entry.detach)
    {
        
        for (const auto & part : parts_to_remove)
        {
            LOG_INFO(log, "Detaching {}", part->relative_path);
            part->makeCloneInDetached("", metadata_snapshot);
        }
    }
    
    tryRemovePartsFromZooKeeperWithRetries(parts_to_remove);
    if (entry.detach)
        LOG_DEBUG(log, "Detached {} parts inside {}.", parts_to_remove.size(), entry.new_part_name);
    else
        LOG_DEBUG(log, "Removed {} parts inside {}.", parts_to_remove.size(), entry.new_part_name);
    
    
    parts_to_remove.clear();
    cleanup_thread.wakeup();
}
bool StorageReplicatedMergeTree::executeReplaceRange(const LogEntry & entry)