infra: Switch to "angle_2" presubmit config. We will revert this once we remove the depot_tools config. Bug: angleproject:5114 Change-Id: If922a24c9955ba5d5d30ec634fa6c3d6db177f65 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2831999 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>