Add last releng images builder prow jobs

[cpanato]

• Add last image build jobs
• turn all presubmits jobs required

k/release associate pr: kubernetes/release#1950

/assign @justaugustus @saschagrunert @hasheddan

tracking issue: kubernetes/release#1850

[justaugustus]

@cpanato -- Just a few nits

[justaugustus]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, justaugustus

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[k8s-ci-robot]

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

• key k8s-staging-releng.yaml using file config/jobs/image-pushing/releng/k8s-staging-releng.yaml
• key release-config.yaml using file config/jobs/kubernetes/release/release-config.yaml

In response to this:

• Add last image build jobs
• turn all presubmits jobs required

k/release associate pr: kubernetes/release#1950

/assign @justaugustus @saschagrunert @hasheddan

tracking issue: kubernetes/release#1850

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