Now that the migration has happened for these builders, switch
to the new new configs.

Bug: angleproject:2414
Change-Id: Ied26f54f8a679b613f354d6510abf1f79adc6e9e
Reviewed-on: https://chromium-review.googlesource.com/968542Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>