Add s390/s390x CPU topology

[madeelibm]

s390x CPU topology is missing in cadvisor which made kubelet service returns error when enabling CPU Manager. This patch adds missing CPU topology with which CPU Manager can also be enabled on s390x platform.
Please for review and if there are concerns let us know.

[k8s-ci-robot]

Hi @madeelibm. Thanks for your PR.

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[madeelibm]

@bobbypage We are adding support for s390x again with the PR: #3521

[madeelibm]

Can someone help to merge this PR?

[haircommander]

/ok-to-test

[k8s-ci-robot]

@haircommander: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/ok-to-test

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[mrunalp]

/ok-to-test

[haircommander]

you have some test failures that need fixing @madeelibm

in the meantime @iwankgb @bobbypage PTAL

[iwankgb]

LGTM besides returning err instead of explicit nil in two places.

[madeelibm]

/retest

[madeelibm]

/retest

[madeelibm]

/retest

[madeelibm]

All tests are passing now on x86 and Z.

[haircommander]

@iwankgb PTAL

[iwankgb]

@madeelibm, can you merge master, please?

[iwankgb]

/retest