project-lakitu: Add GCE as the datasource for all boards

BUG=b/179836389
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I9704dd3263b71f005c63f5f0d4eddbf99bb4763b
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/12190
Reviewed-by: Roy Yang <royyang@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
9 files changed