Add oldest images from each server family to package test

[jjerger]

Tests for regressions between current image and first images

[jjerger]

/assign bkatyl

[jjerger]

Brian - with the deprecation of the windows-2012-r2 image family all the images were marked obsolete so those images are not usable, however the windows-2012-r2-internal images are still accessible so I added those in. I'm not sure how different those would be from the obsoleted family so I wanted to bring this to your attention before merging.

[google-oss-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bkatyl, jjerger

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[google-oss-prow[bot]]

@jjerger: Updated the job-config configmap in namespace default at cluster default using the following files:

• key gcp-guest-config.yaml using file prow/prowjobs/GoogleCloudPlatform/gcp-guest/gcp-guest-config.yaml

In response to [this](https://github.com/GoogleCloudPlatform/oss-test-infra/pull/2297): >Tests for regressions between current image and first images Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes-sigs/prow](https://github.com/kubernetes-sigs/prow/issues/new?title=Prow%20issue:) repository.