sql/schema: ALTER TABLE RENAME with multiple table names

Under the legacy schema changer the following is possible

```sql
CREATE TABLE old_table1 (
id INT PRIMARY KEY,
name STRING
);

CREATE TABLE old_table2 (
id INT PRIMARY KEY,
description STRING
);

CREATE TABLE old_table3 (
id INT PRIMARY KEY,
created_at TIMESTAMPTZ
);

SET autocommit_before_ddl=off; -- 25.1

BEGIN;
ALTER TABLE old_table1 RENAME TO new_table1;
ALTER TABLE old_table2 RENAME TO new_table2;
ALTER TABLE old_table3 RENAME TO new_table3;
COMMIT;
```

It would be nice if we could provide a single line equivalent in declarative schema changer similar to how we can chain other ALTER:

```sql
ALTER TABLE old_table1 RENAME TO new_table1,
old_table2 RENAME TO new_table2,
old_table3 RENAME TO new_table3;
```

Jira issue: CRDB-51549

Epic CRDB-31472