This test is timing out on a Windows 7 config.

Test: GLES1ConformanceTest.AmbLight/ES1_Vulkan
Bug: angleproject:5234
Change-Id: I4c3ccdeb58d793952aaa44d4902dedf7ce192ec3
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2496142Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>