We were using the incorrect test list to set up initial test
expectations. Fix this by using the already generated test set
in the test suite.

Test: angle_unittests with --bot-mode, sharding, and filter
Bug: angleproject:3162
Change-Id: Id108943494130410caab404faad25115792e794d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2419596Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>