anv: Don't ambiguate for undefined layouts on TGL+

anv: Don't ambiguate for undefined layouts on TGL+

For Tiger Lake and onward, we generally don't need to ambiguate the CCS
before accessing it. This is safe for two reasons:

- Tiger Lake and onward treat all CCS values as legal.
- We enable compression on all writable image layouts. The CCS will
  receive all writes and will therefore always be valid.

When dealing with modifiers, we continue to allow ambiguates in some
instances.

Before this patch, I found ~19.5k ambiguates in Wolfenstein:
Youngblood's Riverside benchmark (note that this includes manually
entering the benchmark and exiting the app). With this patch, the number
of ambiguates goes down to zero.

Improves performance of Fallout 4 at 1080p/High settings on Arc A380 by
around 22%.

Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20118>