Moving material type asset PostInit call to be consistent with material asset

Signed-off-by: Guthrie Adams <guthadam@amazon.com>

Gems/Atom/RPI/Code/Source/RPI.Reflect/Material/MaterialTypeAsset.cpp

@@ -188,6 +188,10 @@ namespace AZ
         void MaterialTypeAsset::SetReady()
         {
             m_status = AssetStatus::Ready;
+
+            // If this was created dynamically using MaterialTypeAssetCreator (which is what calls SetReady()),
+            // we need to connect to the AssetBus for reloads.
+            PostLoadInit();
         }
 
         bool MaterialTypeAsset::PostLoadInit()

Gems/Atom/RPI/Code/Source/RPI.Reflect/Material/MaterialTypeAssetCreator.cpp

@@ -43,7 +43,6 @@ namespace AZ
                 return false; 
             }
 
-            m_asset->PostLoadInit();
             m_asset->SetReady();
 
             m_materialShaderResourceGroupLayout = nullptr;