Was skipped only on Vulkan, but it hangs on other backends too, like
D3D11.

Bug: angleproject:3629
Change-Id: I3a812d86e1765507fb03a58c6d10c6a48edc0f2f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1687124Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>