fix: subquery alias in RLS (#34374)

tests/unit_tests/sql_lab_test.py

@@ -259,13 +259,13 @@ FROM (
   FROM t1
   WHERE
     c1 = 1
-) AS t1, (
+) AS "t1", (
   SELECT
     *
   FROM t2
   WHERE
     c2 = 2
-) AS t2
+) AS "t2"
         """.strip()
     )