[alien,refsemantic] Include Arccore header file 'MessagePassingGlobal.h' instead of explicitly defining the type.

This is needed when we will move the type 'IMessagePassingMng' in Arcane
namespace.

Author: grospelliergilles

alien/standalone/src/refsemantic/alien/ref/import_export/SystemReader.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 IFPEN-CEA
+ * Copyright 2025 IFPEN-CEA
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,15 +22,11 @@
 #include <vector>
 
 #include <arccore/base/ArccoreGlobal.h>
+#include <arccore/message_passing/MessagePassingGlobal.h>
 
 #include <alien/ref/AlienRefExport.h>
 #include <alien/ref/AlienRefSemanticPrecomp.h>
 
-namespace Arccore::MessagePassing
-{
-class IMessagePassingMng;
-}
-
 namespace Alien
 {