Before enabling gles31 vulkan tests on the bots, there are some test
expectations that must be updated.

Bug: 3521
Change-Id: If48cad3d7405cc331e133bf80f62b34d33504c66
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1680066Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>