Re-land changes:

 * Unit test is suppressed in ASAN
 * --deqp-case is fixed
 * Debug layer errors should correctly work with failure expectations

Original message:

The ANGLE test harness is a harness around GoogleTest that provides
functionality similar to the Chromium test harness. It supports:

 * splitting a test set into shards
 * catching and reporting crashes and timeouts
 * outputting to the Chromium JSON test results format
 * multi-process execution

Unit tests are added in test_utils_unittest.cpp.

Bug: angleproject:3162
Change-Id: I841f2b5dfe51f7f44dac68324bdf6afd418b8bfb
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1948240Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>