Added the VK_IMAGE_CREATE_EXTENDED_USAGE_BIT flag to textures created…

… with isTypeless = true.

src/vulkan/vulkan-texture.cpp

@@ -210,7 +210,7 @@ namespace nvrhi::vulkan
             flags |= vk::ImageCreateFlagBits::eCubeCompatible;
 
         if (d.isTypeless)
-            flags |= vk::ImageCreateFlagBits::eMutableFormat;
+            flags |= vk::ImageCreateFlagBits::eMutableFormat | vk::ImageCreateFlagBits::eExtendedUsage;
 
         return flags;
     }