Remove file size limits when loading prefabs and prefab-based-levels

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabLoader.cpp

@@ -74,7 +74,7 @@ namespace AzToolsFramework
                 return InvalidTemplateId;
             }
 
-            auto readResult = AZ::Utils::ReadFile(GetFullPath(filePath).Native(), MaxPrefabFileSize);
+            auto readResult = AZ::Utils::ReadFileWithNoSizeLimit(GetFullPath(filePath).Native());
             if (!readResult.IsSuccess())
             {
                 AZ_Error(

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabLoaderInterface.h

@@ -21,8 +21,6 @@ namespace AzToolsFramework
 {
     namespace Prefab
     {
-        constexpr size_t MaxPrefabFileSize = 1024 * 1024;
-
         /*!
          * PrefabLoaderInterface
          * Interface for saving/loading Prefab files.