This CL also adds the ability for a perf test to
elect to ignore GL errors during replay.  Otherwise,
errors will cause the test to fail.  We have known
failures with Manhattan that don't affect replay.

Test: angle_perftests.exe --gtest_filter="*Trace*"
Bug: angleproject:4091
Change-Id: I36268a9f80754f338e52208273e889d2404b7eed
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2090663
Commit-Queue: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>