**Usage**
Postgres, MySQL, and Oracle support the expression `LEFT JOIN ... ON 1 = 1`, but ClickHouse does not.

It may be possible to replace `LEFT JOIN ... ON 1 = 1` with `CROSS JOIN`, but I want to use the query in the same form for lots of databases.

Please support the expression `LEFT JOIN ... ON 1 = 1`.


**Detailed SQL**
```SQL
CREATE TABLE test
(
    `name` Nullable(String),
    `id` int
)
ENGINE = Log();

insert into test values ('a', 1) ('b', 2) (null, 3);

select * from test t1 left join (select * from test ) t2 on 1 = 1   
-- DB::Exception: Not equi-join ON expression: 1 = 1. No columns in one of equality side.: While processing 1 = 1.
```

{
    static_assert(std::is_same_v<SideTag, BothSidesTag> ||
                  std::is_same_v<SideTag, LeftSideTag> ||
                  std::is_same_v<SideTag, RightSideTag>);
    for (auto & expr : expressions)
    {
        if constexpr (std::is_same_v<SideTag, BothSidesTag>)
            assert(expr.key_names_left.size() == expr.key_names_right.size());
        size_t sz = !std::is_same_v<SideTag, RightSideTag> ? expr.key_names_left.size() : expr.key_names_right.size();
        for (size_t i = 0; i < sz; ++i)
        {
            bool cont;
            if constexpr (std::is_same_v<SideTag, BothSidesTag>)
                cont = callback(expr.key_names_left[i], expr.key_names_right[i]);
            if constexpr (std::is_same_v<SideTag, LeftSideTag>)
                cont = callback(expr.key_names_left[i]);
            if constexpr (std::is_same_v<SideTag, RightSideTag>)
                cont = callback(expr.key_names_right[i]);
            if (!cont)
                return false;
        }
    }
    return true;
}
}
TableJoin::TableJoin(const Settings & settings, VolumePtr tmp_volume_)