Add fuzz seeds for pg alter default privileges

Author: LucaCappelletti94

fuzz/fuzz_seeds/postgres_2417_alter_default_privileges.sql

@@ -0,0 +1,10 @@
+ALTER DEFAULT PRIVILEGES FOR ROLE postgres IN SCHEMA public GRANT SELECT ON TABLES TO app_user;
+ALTER DEFAULT PRIVILEGES FOR ROLE a, b IN SCHEMA s1, s2 GRANT SELECT, INSERT ON TABLES TO app WITH GRANT OPTION;
+ALTER DEFAULT PRIVILEGES FOR USER bob GRANT ALL PRIVILEGES ON SEQUENCES TO app;
+ALTER DEFAULT PRIVILEGES GRANT EXECUTE ON FUNCTIONS TO app;
+ALTER DEFAULT PRIVILEGES GRANT USAGE ON ROUTINES TO app;
+ALTER DEFAULT PRIVILEGES GRANT USAGE, CREATE ON TYPES TO app;
+ALTER DEFAULT PRIVILEGES GRANT SELECT ON SCHEMAS TO app;
+ALTER DEFAULT PRIVILEGES GRANT SELECT, UPDATE ON LARGE OBJECTS TO app;
+ALTER DEFAULT PRIVILEGES REVOKE SELECT ON TABLES FROM app;
+ALTER DEFAULT PRIVILEGES REVOKE GRANT OPTION FOR ALL ON TABLES FROM app CASCADE