MDEV-24693 LeakSanitizer: detected memory leaks in mem_heap_create_block_func...

MDEV-24693 LeakSanitizer: detected memory leaks in mem_heap_create_block_func / fts_optimize_create_msg

- This issue is caused by the commit bf1f9b59
(MDEV-24638). Delay the creation of SYNC message in
fts_optimize_request_sync_table. So that InnoDB can avoid creating
the message if the table already has SYNC message in fts_optimize_wq queue

storage/innobase/fts/fts0opt.cc

@@ -2654,8 +2654,6 @@ fts_optimize_request_sync_table(
 		return;
 	}
 
-	fts_msg_t* msg = fts_optimize_create_msg(FTS_MSG_SYNC_TABLE, table);
-
 	mutex_enter(&fts_optimize_wq->mutex);
 
 	if (table->fts->sync_message) {
@@ -2665,6 +2663,8 @@ fts_optimize_request_sync_table(
 		return;
 	}
 
+	fts_msg_t* msg = fts_optimize_create_msg(FTS_MSG_SYNC_TABLE, table);
+
 	add_msg(msg, true);
 
 	table->fts->sync_message = true;