bisect-kit: treat no tests found as temporary error

BUG=b:223094525
TEST=unit test

Change-Id: I626623212aab392cef1063e7b08d644d2b96d47b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/bisect-kit/+/3521065
Tested-by: Kuang-che Wu <kcwu@chromium.org>
Auto-Submit: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Zheng-Jie Chang <zjchang@chromium.org>
Commit-Queue: Zheng-Jie Chang <zjchang@chromium.org>
2 files changed