Also build the hyperkube docker image on-the-fly.
This is only a temporary fix until the proposal in issue
https://github.com/kubernetes/kubernetes/issues/28630 is implemented.
Also, the new build/deployment method completely obviates this step.
We use debian image instead of busybox and do not build hyperkube as a
static binary yet. Wait until PR
https://github.com/kubernetes/kubernetes/pull/26028 is merged to build
static hyperkube binaries.
Fixes#27684.
For now, I'm simply poking a hole to grab the system /etc/ssl/certs. If
we decide we want something less dependent on the node filesystem, we
will need to decide how we pick a "distro" more sophisticated than
busybox for federation components running on k8s. I'll open a followup
issue to discuss this.
