cloudbots: Use common util to determine cloudbot status

BUG=b:333567433
TEST=unittest

Change-Id: I135b78c6578879f5794515da90f43c7bd68d99d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5650060
Reviewed-by: Azizur Rahman <azrahman@google.com>
Tested-by: Garry Wang <xianuowang@chromium.org>
Commit-Queue: Garry Wang <xianuowang@chromium.org>
Reviewed-by: Bryan Ni <bniche@google.com>
(cherry picked from commit d72ba0213b9ba15dceede3d347ea56ff45663981)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5681257
4 files changed