This ensures we will force the CQ to verify the trace tests before
changes to the capture test script itself, or the test expectations.

Bug: angleproject:5530
Change-Id: I7d9d04a14ae0525a6ff59681216abbdb85b72c78
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2689365Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>