[gp_stats_collector] Wrap hook call in try/catch on error path

Add PG_TRY/PG_CATCH around query_info_collect_hook in PortalCleanup
error path to prevent exceptions from propagating during cleanup.

Author: NJrslv

src/backend/commands/portalcmds.c

@@ -374,10 +374,22 @@ PortalCleanup(Portal portal)
 			FreeQueryDesc(queryDesc);
 
 			CurrentResourceOwner = saveResourceOwner;
-		} else {
+		}
+		else
+		{
 			/* GPDB hook for collecting query info */
 			if (queryDesc->gpsc_query_key && query_info_collect_hook)
-				(*query_info_collect_hook)(METRICS_QUERY_ERROR, queryDesc);
+			{
+				PG_TRY();
+				{
+					(*query_info_collect_hook)(METRICS_QUERY_ERROR, queryDesc);
+				}
+				PG_CATCH();
+				{
+					FlushErrorState();
+				}
+				PG_END_TRY();
+			}
 		}
 	}