tuple constructor bug with `row` syntax

**Describe the problem**

Wrong row value creation when using `row` syntax, while plain `(...)` works as expected

**To Reproduce**

```sql
WITH user_api_keys AS (
SELECT 1 AS user_id, 101 AS user_api_key_id, 'abc123' AS api_key
), users AS (
SELECT 1 AS user_id, 'John Doe' AS name
)
SELECT user_api_keys.user_api_key_id, user_api_keys.user_id, row(users.*) AS user
FROM user_api_keys
LEFT JOIN users ON users.user_id = user_api_keys.user_id
WHERE user_api_keys.api_key = 'abc123';
user_api_key_id | user_id | user
------------------+---------+-----------------------
101 | 1 | ("(1,""John Doe"")")

```

while this is correct:

```sql

WITH user_api_keys AS (
SELECT 1 AS user_id, 101 AS user_api_key_id, 'abc123' AS api_key
), users AS (
SELECT 1 AS user_id, 'John Doe' AS name
)
SELECT user_api_keys.user_api_key_id, user_api_keys.user_id, (users.*) AS user
FROM user_api_keys
LEFT JOIN users ON users.user_id = user_api_keys.user_id
WHERE user_api_keys.api_key = 'abc123';
user_api_key_id | user_id | user
------------------+---------+-----------------
101 | 1 | (1,"John Doe")
```

**Environment:**
- CockroachDB version v22.1 Playground

Jira issue: CRDB-26506

Start by running the supplied SQL reproducer in the CockroachDB v22.1 Playground and compare row(users.*) with (users.*). No source file or test is named; locate the relevant tuple-construction entry point and add regression coverage showing that row(users.*) returns the same tuple values as the plain row syntax.

Written by the indexing model from the issue text.