Add the "--adapter" flag to run-cts as a helper for setting this.
Make "--verbose" print the picked adapter.
Rename "dawn-backend" flag to just "backend" - this is already specific to the "gpu provider" (dawn).
Change-Id: Idc8d0eb3ccf5fa23325c06f0f9520aa9b528d9dd
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/116295
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
c9c937cc3e