With robustResourceInit in place we can enable the the tests.

Bug: angleproject:5974
Change-Id: I53911ebf9aed1ef537ebf4c539eca7b284a17e98
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2912676Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Gert Wollny <gert.wollny@collabora.com>