Test Runner: Fix sharding and --bot-mode. 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/+/2419596 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>