partition_prune testcase fails in pgcheck while running installcheck-world with PGSM loaded into server.

[Naeem-Akhter]

With 'compute_query_id=off' and PGSM library loaded into the server, if one runs the installcheck-world on the server following server (pgcheck) test case fails. This is reproducible on PG-14, 15 & 16 while using PGSM main branch todate.

`diff -U3 /home/runner/work/pg_stat_monitor/pg_stat_monitor/src/test/regress/expected/partition_prune.out /home/runner/work/pg_stat_monitor/pg_stat_monitor/src/test/regress/results/partition_prune.out
--- /home/runner/work/pg_stat_monitor/pg_stat_monitor/src/test/regress/expected/partition_prune.out 2023-09-12 09:38:07.134813167 +0000
+++ /home/runner/work/pg_stat_monitor/pg_stat_monitor/src/test/regress/results/partition_prune.out 2023-09-12 09:54:02.387744909 +0000
@@ -3358,7 +3358,8 @@
-> Merge Append (actual rows=0 loops=1)
Sort Key: ma_test.b
Subplans Removed: 3
-(5 rows)

• Query Identifier: 1
  +(6 rows)

deallocate mt_q2;
-- ensure initplan params properly prune partitions`