[sig-release] Update sig release jobs to use podutils

[dims]

related to #30846

Also please see:

• Migrate jobs away from deprecated bootstrap usage #20760
• https://docs.prow.k8s.io/docs/components/pod-utilities/
• https://gist.github.com/dims/c1296f8ed42238baea0a5fcae45f4cf4

[ameukam]

/lgtm

[xmudrii]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, xmudrii

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[xmudrii]

/retest

[k8s-ci-robot]

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

• key 1.25.yaml using file config/jobs/kubernetes/sig-release/release-branch-jobs/1.25.yaml
• key 1.26.yaml using file config/jobs/kubernetes/sig-release/release-branch-jobs/1.26.yaml
• key 1.27.yaml using file config/jobs/kubernetes/sig-release/release-branch-jobs/1.27.yaml
• key 1.28.yaml using file config/jobs/kubernetes/sig-release/release-branch-jobs/1.28.yaml

In response to this:

related to #30846

Also please see:

• Migrate jobs away from deprecated bootstrap usage #20760
• https://docs.prow.k8s.io/docs/components/pod-utilities/
• https://gist.github.com/dims/c1296f8ed42238baea0a5fcae45f4cf4

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