infra: Enable UBSAN together with ASAN and LSAN. These flags are compatible. This should save on testing resources. Bug: angleproject:7871 Change-Id: I860e3724f54bdbf06e7530bd6bfe72ec0f53cc54 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4086283 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>