kubelet: drop pod-infra-container-image usage

[haircommander]

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- How to verify it

- Description for the changelog

[openshift-ci]

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[yuqi-zhang]

Should we wait for 4.22 to branch this friday or should we get this in to 4.21 ahead of the kube update

[openshift-ci]

@haircommander: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-gcp-op-single-node	8c30ff7	link	true	/test e2e-gcp-op-single-node
ci/prow/e2e-gcp-op-2of2	8c30ff7	link	true	/test e2e-gcp-op-2of2
ci/prow/e2e-gcp-op-1of2	8c30ff7	link	true	/test e2e-gcp-op-1of2
ci/prow/bootstrap-unit	8c30ff7	link	false	/test bootstrap-unit
ci/prow/e2e-aws-ovn-upgrade	8c30ff7	link	true	/test e2e-aws-ovn-upgrade
ci/prow/e2e-openstack	8c30ff7	link	false	/test e2e-openstack

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[haircommander]

we can wait till branch I think