au_test_harness: Rename whitelist_chrome_crashes Per go/COIL, we are renaming the test_that command-line arg 'whitelist-chrome-crashes' to 'allow-chrome-crashes'. This CL changes the au_test_harness scripts to accommodate that change. Uploaded with --no-verify because the lint errors were nontrivial to fix. BUG=b:159917945 TEST=None Cq-Depend: chromium:2385861 Change-Id: Ia810d25b5f4605d38d2839b90ef7030159c1a3cb Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/2385862 Tested-by: Greg Edelston <gredelston@google.com> Reviewed-by: Sean Abraham <seanabraham@chromium.org>