bot_scaling.proto: Add policy mode option for bot policies

Add a policy mode option, and Mode ENUM, to allow a bot policy to be
configured to only collect stats or to fully monitor and configure a bot
policy.  This allows policies to be disabled without removing them from
configuration.

Bug: chromium:1027593
Change-Id: I43021105d37dee26fc85b3ed9383094ac7317ae4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2108921
Commit-Queue: Mike Nichols <mikenichols@chromium.org>
Tested-by: Mike Nichols <mikenichols@chromium.org>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
2 files changed