Fix Attachment FrameRefType
Fix Attachment FrameRefType

Attachments might be read and/or written. Pessimistically assume attachments are
read and then overwritten. Further analysis should be able to refine this access
type in some cases.

googlestadia/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,Zorro666/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,baldurk/renderdoc