**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.

case QueryLogFactories::TableFunction:
            query_factories_info.table_functions.emplace(created_object);
    }
}
StoragePtr Context::executeTableFunction(const ASTPtr & table_expression)
{
    
    auto hash = table_expression->getTreeHash();
    String key = toString(hash.first) + '_' + toString(hash.second);
    StoragePtr & res = table_function_results[key];
    if (!res)
    {
        TableFunctionPtr table_function_ptr = TableFunctionFactory::instance().get(table_expression, shared_from_this());
        
        res = table_function_ptr->execute(table_expression, shared_from_this(), table_function_ptr->getName());
    }
    return res;
}
void Context::addViewSource(const StoragePtr & storage)
{
    if (view_source)
        throw Exception(
            "Temporary view source storage " + backQuoteIfNeed(view_source->getName()) + " already exists.", ErrorCodes::TABLE_ALREADY_EXISTS);
    view_source = storage;
}
StoragePtr Context::getViewSource() const
{
    return view_source;
}
Settings Context::getSettings() const