Vulkan: Clear DS through render pass even if color is masked Other than for a Qualcomm driver bug workaround, this makes a few fallbacks unnecessary. Bug: angleproject:2361 Change-Id: I8bdc8efba69527ca89bfa7b646a9d41e07f4f895 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1541669 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>