Revert "vulkan: Implement coherent FramebufferFetch"

This reverts commit 5d40cfd4cf77fee5a479e97e8912ca45b143ef0d.

Reason for revert: Likely causing the failure on mac-rel in the Dawn/Chromium roller.

Original change's description:
> vulkan: Implement coherent FramebufferFetch
>
> This adds FramebufferFetch support to the Vulkan backend when the
> VK_EXT_rasterization_order_attachment_access extension is available. The
> general approach is that when FramebufferFetch is enabled the main
> subpass will have one input attachment corresponding to each color
> attachment. If a pipeline uses the @color attribute a VkDescriptorSet
> with an input attachment for each color attachment is created/bound
> that Tint can sample them. Tint already has the logic to handle the
> color attribute and sample attachments.
>
> The rasterization order extension ensures that any previous draws in the
> same render pass are complete before pixel values are sampled.
>
> FramebufferFetchHelper encapsulates the logic to allocate
> VkDescriptorSets and VkDescriptorSetLayouts for this feature.
>
> Bug: 42241389
> Change-Id: I369886c75577966663b181800a71c4d08f9541bc
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/290895
> Commit-Queue: Kyle Charbonneau <kylechar@google.com>
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Auto-Submit: Kyle Charbonneau <kylechar@google.com>
> Reviewed-by: Brandon Jones <bajones@chromium.org>

Bug: 42241389
Change-Id: Ia5802a27548d3cf0cbf0a0f1ae6dc8ca8b2421cf
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/306875
Auto-Submit: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Fr <beaufort.francois@gmail.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Fr <beaufort.francois@gmail.com>