Seeing intermittent failure on this test only on MacOS/NVIDIA/OPENGL.
Suppress for now.

Bug: angleproject:4258
Change-Id: Ibda30954019410e3b6d069986b2cd0ad26533c00
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1984850Reviewed-by: Shrek Shao <shrekshao@google.com>
Commit-Queue: Shrek Shao <shrekshao@google.com>