This reverts commit d00a9a14.

Reason for revert: Suspect for breaking Debug bots.
Original change's description:
> Vulkan: Roll VK deps forward
> 
> Roll VK Headers/Tools/Loader/ValidationLayers forward.
> There's a build improvement as well as many new checks.
> 
> Added new source file dep, convert_to_renderpass2.cpp, used by core_
> validation for added RenderPass2 checks.
> 
> Bug: angleproject:2937
> Bug: chromium:845519
> Change-Id: Id5c30c5bfc684c365a8ad97c3289bccc02afb3b3
> Reviewed-on: https://chromium-review.googlesource.com/c/1305673
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Tobin Ehlis <tobine@google.com>

TBR=ynovikov@chromium.org,jmadill@chromium.org,cnorthrop@google.com,tobine@google.com,syoussefi@chromium.org

Change-Id: I5c48315dd8c80510e7dea54cb384c08dce5b6bcb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2937, chromium:845519
Reviewed-on: https://chromium-review.googlesource.com/c/1307695Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>