This commit adds the `k8s.io/metrics` APIs to the list of packages for
which to generate protobuf. Additionally, it adds
`k8s.io/client-go/pkg/apis/v1` as a non-generated (referenced) package.
We also add "version" to all docker images and containers
This version is to be incremented manually when we change the shape of the build
image (like changing the golang version or the set of volumes in the data
container). This will delete all older versions of images and containers when
the version is different.
This mostly takes the previously checked in files and removes them, and moves
the generation to be on-demand instead of manual. Manually verified no change
in generated output.
