Add ClearTestES3.TextureArrayRGB8
Add ClearTestES3.TextureArrayRGB8

Bug: angleproject:4608
Change-Id: I0bb483e346f3fc605f4b31f74457b1bbaacbf86f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2172092
Commit-Queue: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle