This reverts commit 3705fc41.

Reason for revert: Causes errors on Debug bots. See bug.

Bug: angleproject:5121

Original change's description:
> Vulkan:Add debug labels for OpenGL calls
>
> Implement the DebugAnnotatorVk class, and plumb the EVENT macro in the
> GL entrypoints to save a string of call info in the vector of all
> GL calls in ContextVk.
>
> Then add a vkCmdBeginDebugUtilsLabelEXT() call that includes the
> OpenGL draw/dispatch call prior to any Vulkan Draw or Dispatch calls.
> Also embedded under that label add a second
> vkCmdBeginDebugUtilsLabelEXT() call labeled "OpenGL Commands" that
> includes all of the OpenGL calls leading up to the draw/dispatch.
> Each individual OpenGL call is then given its own
> vkCmdBegin/EndDebugUtilsLabelEXT() pair so that the complete sequence
> of GL calls leading up to a draw call is visible for each Draw.
>
> Enable the OGL->VK mapping feature by setting
> "angle_enable_trace = true" in GN args.
>
> Note: This will create an ANGLE APK on Android that generally won't
> work with games, unless launched by AGI (which provides the debug
> utils extension).  A future version will disable these labels unless
> the debug utils extension is found.
>
> Bug: b/162068318
> Bug: b/169243237
> Change-Id: I09886f17fa9287528c12552698738ea1fe2a4b8c
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2427557
> Commit-Queue: Ian Elliott <ianelliott@google.com>
> Reviewed-by: Tim Van Patten <timvp@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

TBR=courtneygo@google.com,ianelliott@google.com,timvp@google.com,syoussefi@chromium.org,jmadill@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: b/162068318
Bug: b/169243237
Change-Id: I772d549213e1ad64ae58a1937e5de0f7ea740084
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2444094Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>