This consumes [gpuweb/cts#3756](https://github.com/gpuweb/cts/pull/3756)
as a cherry-pick against the [current
tip](5c8510ec0d)
of `fx-ci` in
[mozilla/gpuweb-cts](https://github.com/mozilla/gpuweb-cts).
Differential Revision: https://phabricator.services.mozilla.com/D210953