Improve stability of tests when compiling with --with-llvm

Some tests have been generating diffs when linking pg_hint_plan to LLVM,
and generated extra information in the plans without changing their
stability.  Let's disable JIT in the tests where this happened, for now,
improving the stability of the tests.

Per issue #199.

Reported-by: Shinya Kato
Backpatch-through: 17

expected/ut-J.out

@@ -4,6 +4,7 @@ SET pg_hint_plan.debug_print TO on;
 SET client_min_messages TO LOG;
 SET search_path TO public;
 SET max_parallel_workers_per_gather TO 0;
+SET jit = off;
 EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1;
              QUERY PLAN             
 ------------------------------------

expected/ut-R.out

@@ -2,6 +2,7 @@ LOAD 'pg_hint_plan';
 SET pg_hint_plan.enable_hint TO on;
 SET pg_hint_plan.debug_print TO on;
 SET client_min_messages TO LOG;
+SET jit = off;
 SET search_path TO public;
 SELECT explain_filter('
 EXPLAIN SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1;

expected/ut-S.out

@@ -4,6 +4,7 @@ SET pg_hint_plan.debug_print TO on;
 SET client_min_messages TO LOG;
 SET search_path TO public;
 SET max_parallel_workers_per_gather TO 0;
+SET jit = off;
 EXPLAIN (COSTS false) SELECT * FROM s1.t1 WHERE t1.c1 >= 1;
      QUERY PLAN      
 ---------------------

sql/ut-J.sql

@@ -4,6 +4,7 @@ SET pg_hint_plan.debug_print TO on;
 SET client_min_messages TO LOG;
 SET search_path TO public;
 SET max_parallel_workers_per_gather TO 0;
+SET jit = off;
 
 EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1;
 

sql/ut-R.sql

@@ -2,6 +2,7 @@ LOAD 'pg_hint_plan';
 SET pg_hint_plan.enable_hint TO on;
 SET pg_hint_plan.debug_print TO on;
 SET client_min_messages TO LOG;
+SET jit = off;
 SET search_path TO public;
 SELECT explain_filter('
 EXPLAIN SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1;

sql/ut-S.sql

@@ -4,6 +4,7 @@ SET pg_hint_plan.debug_print TO on;
 SET client_min_messages TO LOG;
 SET search_path TO public;
 SET max_parallel_workers_per_gather TO 0;
+SET jit = off;
 
 EXPLAIN (COSTS false) SELECT * FROM s1.t1 WHERE t1.c1 >= 1;
 EXPLAIN (COSTS false) SELECT * FROM s1.t1 WHERE t1.c1 = 1;