**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.
```

{
        if constexpr (MapGetter<KIND, STRICTNESS>::flagged)
        {
            assert(flags[block_ptr].size() <= block_ptr->rows());
            need_flags = true;
            flags[block_ptr] = std::vector<std::atomic_bool>(block_ptr->rows());
        }
    }
    template <bool use_flags, bool multiple_disjuncts, typename FindResult>
    void JoinUsedFlags::setUsed(const FindResult & f)
    {
        if constexpr (!use_flags)
            return;
        
        if constexpr (multiple_disjuncts)
        {
            auto & mapped = f.getMapped();
            flags[mapped.block][mapped.row_num].store(true, std::memory_order_relaxed);
        }
        else
        {
            flags[nullptr][f.getOffset()].store(true, std::memory_order_relaxed);
        }
    }
    template <bool use_flags, bool multiple_disjuncts, typename FindResult>
    bool JoinUsedFlags::getUsed(const FindResult & f)