Fix host orchestrator e2e tests

Revert "Add grub-efi-amd64-bin into control"

This reverts commit 9e4db0f.

Promote v0.9.29 to unstable

Promote cuttlefish-base v0.9.28 to unstable

Bump version numbers in preperation for new host image

Bug: b/281897851

Change version to 0.9.26

  * Change operator's web UI to tile UI

Old master branch as of Aug 19 2020