Update testplan for new DutAttribute schema and location.

- Update for changes in
https://chromium-review.googlesource.com/c/chromiumos/config/+/3127629
(proto schema change) and
https://chrome-internal-review.googlesource.com/c/chromeos/config-internal/+/4115816
(location change).

- Going to use to generate new CoverageRule format in config-internal
in future CLs.

BUG=b:199517369
BUG=b:196070598
TEST=`go test ./...`

Change-Id: I214a9c79bf80ad559edee19d2e2f35e695078033
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/3174079
Reviewed-by: Sean McAllister <smcallis@google.com>
Commit-Queue: Andrew Lamb <andrewlamb@chromium.org>
Tested-by: Andrew Lamb <andrewlamb@chromium.org>
5 files changed