add cos jobs to kops grid

[upodroid]

Following up from #35839

/cc @ameukam @hakman

I switched to t2a as they support PD disks, C4A will work after kubernetes/kops#17712 is merged

[k8s-ci-robot]

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[ameukam]

/lgtm

[k8s-ci-robot]

@upodroid: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key kops-periodics-grid.yaml using file config/jobs/kubernetes/kops/kops-periodics-grid.yaml
• key kops-periodics-nftables.yaml using file config/jobs/kubernetes/kops/kops-periodics-nftables.yaml

In response to this:

Following up from #35839

/cc @ameukam @hakman

I switched to t2a as they support PD disks, C4A will work after kubernetes/kops#17712 is merged

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[ameukam]

T2A machines are only available in us-central1.
https://testgrid.k8s.io/kops-nftables#kops-gce-nftables-deb13arm64