infra: Build traces on perf bots. This is necessary to ensure they run the trace tests in perf. Bug: angleproject:6090 Change-Id: Ib96418c4371f700dbbd54933241b1b88912f9938 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2991903 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>