This will add the trace tests with the "libANGLE/capture/" folder
changes. This will prevent slow trace tests from clogging the CQ
on unrelated changes, while still providing some regression testing.

Bug: angleproject:5530
Change-Id: I76361aaa51c49c84dab8be7d74f4bad0db7d2419
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2686438
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>