releng: Add shadow kubernetes build jobs

[justaugustus]

Here we add a set of "shadow jobs" (ci-kubernetes-shadow-build and
ci-kubernetes-shadow-build-fast), which mirror the configs of
ci-kubernetes-build and ci-kubernetes-build-fast, save a few
configuration details.

The intent here is to begin getting signal by pushing builds to the
community-hosted GCP project (k8s-staging-release-test) instead of the
Google-hosted one.

Having artifacts in the community-hosted GCP project will also enable us
to begin testing flows like building, signing, and publishing debs/rpms.

Signed-off-by: Stephen Augustus saugustus@vmware.com

/assign @tpepper @calebamiles
cc: @kubernetes/release-engineering
/sig release
/area release-eng

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: justaugustus

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• config/jobs/kubernetes/sig-release/OWNERS [justaugustus]
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[justaugustus]

/milestone v1.17

[dims]

/lgtm

[k8s-ci-robot]

@justaugustus: Updated the job-config configmap in namespace default using the following files:

• key shadow-builds.yaml using file config/jobs/kubernetes/sig-release/shadow-builds.yaml

In response to this:

Here we add a set of "shadow jobs" (ci-kubernetes-shadow-build and
ci-kubernetes-shadow-build-fast), which mirror the configs of
ci-kubernetes-build and ci-kubernetes-build-fast, save a few
configuration details.

The intent here is to begin getting signal by pushing builds to the
community-hosted GCP project (k8s-staging-release-test) instead of the
Google-hosted one.

Having artifacts in the community-hosted GCP project will also enable us
to begin testing flows like building, signing, and publishing debs/rpms.

Signed-off-by: Stephen Augustus saugustus@vmware.com

/assign @tpepper @calebamiles
cc: @kubernetes/release-engineering
/sig release
/area release-eng

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