adding physics tick time to post simulate event (#1401)

Code/Framework/AzFramework/AzFramework/Physics/Common/PhysicsEvents.h

@@ -48,7 +48,8 @@ namespace AzPhysics
         using OnPresimulateEvent = AZ::Event<float>;
 
         //! Event triggers at the end of the SystemInterface::Simulate call.
-        using OnPostsimulateEvent = AZ::Event<>;
+        //! Parameter is the total time that the physics system will run for during the Simulate call.
+        using OnPostsimulateEvent = AZ::Event<float>;
 
         //! Event trigger when a Scene is added to the simulation.
         //! When triggered will send the handle to the new Scene.

Code/Framework/AzFramework/AzFramework/Physics/PhysicsSystem.cpp

@@ -43,7 +43,7 @@ namespace AzPhysics
             const AZ::BehaviorAzEventDescription postsimulateEventDescription =
             {
                 "Postsimulate event",
-                {} // Parameters
+                {"Tick time"} // Parameters
             };
 
             behaviorContext->Class<SystemInterface>("System Interface")