asahi: Fix pass type for depth-only pass
If the entire store is masked out, there's no RMW operation on the tilebuffer so we don't need a translucent pass type. This does require setting no_color_output appropriately, which happens as long as we make sure outputs_written has the correct value.
Signed-off-by: Alyssa Rosenzweig alyssa@rosenzweig.io