When grouping tests to test batches, instead of grouping neighboring tests together, use striping so that slow tests are fanned out into multiple batches. This way, no test batch is too slow. Bug: angleproject:4817 Change-Id: I7825539e401ea53b5a31167f206d1f5bfb07bdbf Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2339540Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Manh Nguyen <nguyenmh@google.com>
