**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.

String found_new_part_name;
        
        DataPartPtr src_table_part;
        
        String replica;
    };
    using PartDescriptionPtr = std::shared_ptr<PartDescription>;
    using PartDescriptions = std::vector<PartDescriptionPtr>;
    PartDescriptions all_parts;
    PartDescriptions parts_to_add;
    DataPartsVector parts_to_remove;
    auto table_lock_holder_dst_table = lockForShare(
            RWLockImpl::NO_QUERY, getSettings()->lock_acquire_timeout_for_background_operations);
    auto dst_metadata_snapshot = getInMemoryMetadataPtr();
    for (size_t i = 0; i < entry_replace.new_part_names.size(); ++i)
    {
        all_parts.emplace_back(std::make_shared<PartDescription>(i,
            entry_replace.src_part_names.at(i),
            entry_replace.new_part_names.at(i),
            entry_replace.part_names_checksums.at(i),
            format_version));
    }
    
    {
        auto data_parts_lock = lockParts();
        for (const PartDescriptionPtr & part_desc : all_parts)
        {
            if (!getActiveContainingPart(part_desc->new_part_info, MergeTreeDataPartState::Committed, data_parts_lock))
                parts_to_add.emplace_back(part_desc);
        }