**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.
```

ASTTableJoin::Strictness getStrictness() const { return strictness; }
    const std::optional<TypeIndex> & getAsofType() const { return asof_type; }
    ASOF::Inequality getAsofInequality() const { return asof_inequality; }
    bool anyTakeLastRow() const { return any_take_last_row; }
    const ColumnWithTypeAndName & rightAsofKeyColumn() const;
    //
    #define APPLY_FOR_JOIN_VARIANTS(M) \
        M(key8)                        \
        M(key16)                       \
        M(key32)                       \
        M(key64)                       \
        M(key_string)                  \
        M(key_fixed_string)            \
        M(keys128)                     \
        M(keys256)                     \
        M(hashed)
    //
    #define APPLY_FOR_JOIN_VARIANTS_LIMITED(M) \
        M(key8)                                \
        M(key16)                               \
        M(key32)                               \
        M(key64)                               \
        M(key_string)                          \
        M(key_fixed_string)
    enum class Type