Add fuzz seeds for pg create rule

Author: LucaCappelletti94

fuzz/fuzz_seeds/postgres_2433_create_rule.sql

@@ -0,0 +1,5 @@
+CREATE RULE r AS ON DELETE TO docs DO INSTEAD NOTHING;
+CREATE OR REPLACE RULE r AS ON SELECT TO t DO ALSO NOTHING;
+CREATE RULE r AS ON INSERT TO s1.t DO NOTHING;
+CREATE RULE r AS ON UPDATE TO t WHERE quantity > 100 DO ALSO INSERT INTO audit (id) VALUES (1);
+CREATE RULE r AS ON DELETE TO t DO INSTEAD (UPDATE t2 SET deleted = 1 WHERE id = 1; DELETE FROM t3)

fuzz/fuzz_seeds/postgres_2433_create_rule_notify.sql

@@ -0,0 +1 @@
+CREATE RULE notify_me AS ON UPDATE TO mytable DO ALSO NOTIFY mytable