Narrow these skips to just compute shader failures, which
we will tackle as part of the next sprint.

Bug: 3188
Bug: 3189
Bug: 3810
Test: CopyTexImageTestES3.2DArraySubImage
Change-Id: I74c259712e5f3c9296bd3a6241d1da8f1668ca36
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1832881
Commit-Queue: Ian Elliott <ianelliott@google.com>
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>