Vulkan: Remove swiftshader mipmap3d test skip
Vulkan: Remove swiftshader mipmap3d test skip

Bug: angleproject:3983
Change-Id: I9c487cc7db5d5e22a6cff00b40e4081498ab771f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2128207
Commit-Queue: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

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