kola: add upgrade test from latest ocp rhcos

[mike-nguyen]

Add test to upgrade from RHCOS from the latest OCP y-stream release.
The test also ensures no packages are downgraded.

[miabbott]

I used the system arch for the link. If I can find where the multi-arch graphs are, I think I can make this work on all arches. That would be for a separate PR.

I believe there is only one graph for all arches.

My read of https://github.com/openshift/cincinnati-graph-data#release-names seems to indicate that versions added to a channel apply to all arches as long as the "version property of the release-metadata file included in the release image" matches the version in the channel.

Looking at a recent s390x payload, it just uses the bare version:

$ sudo podman pull quay.io/openshift-release-dev/ocp-release:4.8.15-s390x
$ ctr=$(sudo podman create d53a74d241fadb7fa3856ce492bb78f0e58f803d01a3bc17ed49ef23f9c55739)
$ mnt=$(sudo podman mount $ctr)
$ sudo cat $mnt/release-manifests/release-metadata
{
  "kind": "cincinnati-metadata-v0",
  "version": "4.8.15",
  "previous": [
    "4.7.21",
    "4.7.22",
    "4.7.23",
    "4.7.24",
    "4.7.25",
    "4.7.26",
    "4.7.28",
    "4.7.29",
    "4.7.30",
    "4.7.31",
    "4.7.32",
    "4.7.33",
    "4.7.34",
    "4.8.10",
    "4.8.11",
    "4.8.12",
    "4.8.13",
    "4.8.14",
    "4.8.2",
    "4.8.3",
    "4.8.4",
    "4.8.5",
    "4.8.6",
    "4.8.7",
    "4.8.9"
  ],
  "metadata": {
    "description": "",
    "url": "https://access.redhat.com/errata/RHBA-2021:3821"
  }
}

I don't think we have shipped an update to only one arch yet, but I suppose it is possible.

[miabbott]

This looks sane to me; built + ran the test successfully on my local workstation