sql: `setval` cannot be resolved in a UDF body

The `setval` built-in function cannot be resolved when used inside a UDF body.

For example:

```sql
CREATE SEQUENCE s;

SELECT nextval('s');
-- nextval
-- -----------
-- 1

SELECT setval('s', 10, true);
-- setval
-- ----------
-- 10
-- (1 row)

CREATE function my_setval(i INT) RETURNS VOID LANGUAGE SQL AS $$
SELECT setval('s', i, true);
$$;
-- CREATE FUNCTION

SELECT my_setval(100);
-- ERROR: unknown signature: setval(oid)
-- SQLSTATE: 42883
```

Jira issue: CRDB-32711