**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.

for (auto & part : parts_to_delete_completely)
    {
        if (part_names_to_retry_deletion.count(part->name) == 0)
            parts_to_remove_from_filesystem.emplace_back(part);
        else
            parts_to_retry_deletion.emplace_back(part);
    }
    
    if (!parts_to_retry_deletion.empty())
    {
        rollbackDeletingParts(parts_to_retry_deletion);
        LOG_DEBUG(log, "Will retry deletion of {} parts in the next time", parts_to_retry_deletion.size());
    }
    
    if (!parts_to_remove_from_filesystem.empty())
    {
        clearPartsFromFilesystem(parts_to_remove_from_filesystem);
        removePartsFinally(parts_to_remove_from_filesystem);
        LOG_DEBUG(log, "Removed {} old parts", parts_to_remove_from_filesystem.size());
    }
}
bool StorageReplicatedMergeTree::tryRemovePartsFromZooKeeperWithRetries(DataPartsVector & parts, size_t max_retries)
{
    Strings part_names_to_remove;
    for (const auto & part : parts)
        part_names_to_remove.emplace_back(part->name);
    return tryRemovePartsFromZooKeeperWithRetries(part_names_to_remove, max_retries);
}
bool StorageReplicatedMergeTree::tryRemovePartsFromZooKeeperWithRetries(const Strings & part_names, size_t max_retries)