test: Migrate test plan to test/fleet/v1

This is breaking change to F20 test planning API.
This API is currently in alpha phase.

BUG=chromium:1069063
TEST=./generate.sh

Change-Id: I22cab9fe77fc976b037bef9db77b5feee8e9d79b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2142931
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Alex Zamorzaev <zamorzaev@chromium.org>
2 files changed