This will be used by the new approval workflow to mark a builder
as succeeded or failed (green or red) on the build console, depending
on approvals.
Change-Id: I47bddb1f964d5f5b7c06923660f86f6eb7a5e247
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/125667
Reviewed-by: Jonas Termansen <sortie@google.com>
