**Describe the bug**
Setting `transform_null_in` works incorrectly with `IN` operator over tuples.

**How to reproduce**
1.
```
CREATE TABLE null_in_1 (u UInt32, n Nullable(UInt32)) ENGINE = Memory;
INSERT INTO null_in_1 VALUES (1, NULL), (2, 2), (3, NULL), (4, 4), (5, NULL);
```

```
SET transform_null_in = 1;
SELECT count() FROM null_in_1 WHERE (u, n) IN ((42, NULL));

┌─count()─┐
│       3 │
└─────────┘
```

It interprets all rows, where `n` is `NULL` as matched, despite the value of `u`.


2.
```
CREATE TABLE null_in_1 (a Nullable(UInt32), b Nullable(UInt32)) ENGINE = Memory;
INSERT INTO null_in_1 VALUES (1, NULL) (0, NULL) (NULL, NULL) (NULL, 1) (NULL, 0) (0, 0) (1, 1);
```

```
SET transform_null_in = 1;
SELECT count() FROM null_in_1 WHERE (a, b) IN (0, NULL);

┌─count()─┐
│       3 │
└─────────┘

SELECT count() FROM null_in_1 WHERE (a, b) IN (NULL, 0);

┌─count()─┐
│       3 │
└─────────┘

SELECT count() FROM null_in_1 WHERE (a, b) IN (0, 0);

┌─count()─┐
│       3 │
└─────────┘
```

It doesn't see the difference between default value and null value.

#pragma once
#include <Columns/ColumnNullable.h>
namespace DB
{
/** Replace Nullable key_columns to corresponding nested columns.
  * In 'null_map' return a map of positions where at least one column was NULL.
  * @returns ownership column of null_map.
  */
ColumnPtr extractNestedColumnsAndNullMap(ColumnRawPtrs & key_columns, ConstNullMapPtr & null_map, bool exact_null = false);
}