**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.

}
        else if (code == Coordination::Error::ZBADVERSION)
        {
            
            continue;
        }
        else
            throw Coordination::Exception(code, quorum_last_part_path);
    }
}
bool StorageReplicatedMergeTree::partIsInsertingWithParallelQuorum(const MergeTreePartInfo & part_info) const
{
    auto zookeeper = getZooKeeper();
    return zookeeper->exists(fs::path(zookeeper_path) / "quorum" / "parallel" / part_info.getPartName());
}
bool StorageReplicatedMergeTree::partIsLastQuorumPart(const MergeTreePartInfo & part_info) const
{
    auto zookeeper = getZooKeeper();
    const String parts_with_quorum_path = fs::path(zookeeper_path) / "quorum" / "last_part";
    String parts_with_quorum_str = zookeeper->get(parts_with_quorum_path);
    if (parts_with_quorum_str.empty())
        return false;
    ReplicatedMergeTreeQuorumAddedParts parts_with_quorum(format_version);
    parts_with_quorum.fromString(parts_with_quorum_str);
    auto partition_it = parts_with_quorum.added_parts.find(part_info.partition_id);
    if (partition_it == parts_with_quorum.added_parts.end())
        return false;
    return partition_it->second == part_info.getPartName();
}
bool StorageReplicatedMergeTree::fetchPart(const String & part_name, const StorageMetadataPtr & metadata_snapshot,