ci/amd+intel: Add ANGLE-on-Vulkan testing

We're interested in a Vulkan-only stack in Chrome OS, where Android's GLES would be provided by ANGLE-over-Venus. Let's get some testing covering ANGLE-on-ANV and ANGLE-on-RADV.

These are structured as single pre-merge jobs with partial coverage, and full jobs for when you want to update the rest of the xfails list or double-check your work that might affect ANGLE.

This made it through 129 successful "-full" jobs this weekend, with just 4 new flakes reported.