Add several angle bugs for end2end tests failing on NVIDIA Add several angle bugs for end2end tests failing on NVIDIA. - TwiceMaxVaryingVec2 failing on GLES - MipLevels failing on Shield GLES - GenerateMipmapCubeBaseLevel failing on GL BUG=angleproject:3849 BUG=angleproject:3850 BUG=angleproject:3851 Change-Id: I6e5283f0d4c1c5da8259034dfda3beb94e041b21 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1768016 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>