Update regression for ALL missing from CLUSTER.

Author: bmomjian

src/test/regress/expected/cluster.out

@@ -333,7 +333,7 @@ INSERT INTO clstr_3 VALUES (1);
 -- this user can only cluster clstr_1 and clstr_3, but the latter
 -- has not been clustered
 SET SESSION AUTHORIZATION clstr_user;
-CLUSTER ALL;
+CLUSTER;
 SELECT * FROM clstr_1 UNION ALL
   SELECT * FROM clstr_2 UNION ALL
   SELECT * FROM clstr_3;

src/test/regress/sql/cluster.sql

@@ -125,7 +125,7 @@ INSERT INTO clstr_3 VALUES (1);
 -- this user can only cluster clstr_1 and clstr_3, but the latter
 -- has not been clustered
 SET SESSION AUTHORIZATION clstr_user;
-CLUSTER ALL;
+CLUSTER;
 SELECT * FROM clstr_1 UNION ALL
   SELECT * FROM clstr_2 UNION ALL
   SELECT * FROM clstr_3;