WIP: d3d12: abort process on validator-errors
This allows us to find out stuff like which piglit-tests trigger validation issues.
It's not at all a great idea for general use, so it should probably be reworked to be an opt-in features, if we even want this upstream in the first place.
The reason why I'm posting this, is for visibility. This is how I was able to track down several recently filed issues that might be useful in debugging other failures. Time will show.
Issues found with this: