graphics: hold image heap descriptors whose address another extent pins

src/graphics/host_gpu/renderer/cache/textureCache.h

@@ -43,6 +43,7 @@ public:
 		ImageInfo     info;
 		ImageViewInfo view_info;
 		BindingType   type = BindingType::Texture;
+		bool          heap = false; // PS5: resolved for a resident image heap.
 	};
 
 	TextureCache(GraphicContext& graphics, CommandScheduler& scheduler, PageManager& page_manager,