Support layer: Add invalid data poisoning

Original idea from: https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/9343

One common source of errors is users reading undefined data, either because it has never been initialized or because it the current content been marked as invalid (e.g. loadOp=DONT_CARE or storeOp=DONT_CARE). It would be a useful tool to add configurable data poisoning, with a user-defined poison value. 