[SIG-Network] Google benchmarks for network hierarchy components.

First google benchmarks for hierarchy components.

Gems/Multiplayer/Code/Include/Multiplayer/Components/NetBindComponent.h

@@ -193,6 +193,7 @@ namespace Multiplayer
         friend class EntityReplicationManager;
 
         friend class HierarchyTests;
+        friend class HierarchyBenchmarkBase;
     };
 
     bool NetworkRoleHasController(NetEntityRole networkRole);

Gems/Multiplayer/Code/Include/Multiplayer/Components/NetworkHierarchyRootComponent.h

@@ -96,5 +96,7 @@ namespace Multiplayer
         
         //! Set to false when deactivating or otherwise not to be included in hierarchy considerations.
         bool m_isHierarchyEnabled = true;
+
+        friend class HierarchyBenchmarkBase;
     };
 }