S390x rpm list maintenance support

[cfilleke]

What this PR does / why we need it:

Add support for bazeldnf to maintain the rpm lists for s390x in BUILD.bazel

Add configurations necessary for bazeldnf to generate the rpm lists in WORKSPACE and BUILD.bazel, using the information for how to maintain these lists in .bazelrc, repo.yaml and hack/build/rpm-defs.sh as described in #3089 and #3090

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #3202

Special notes for your reviewer:

@awels @dhiller @alicefr I am planning to

• squash & sign off the commits
• send a note to the group
• mention at community mtg

Release note:

kind/enhancement

[kubevirt-bot]

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[kubevirt-bot]

Thanks for your pull request. Before we can look at it, you'll need to add a 'DCO signoff' to your commits.

📝 Please follow instructions in the contributing guide to update your commits with the DCO

Full details of the Developer Certificate of Origin can be found at developercertificate.org.

The list of commits missing DCO signoff:

• 5254425 Merge branch 'kubevirt:main' into s390x-rpms
• 04bfed3 Merge branch 'kubevirt:main' into s390x-rpms
• 7b2233e Merge branch 'kubevirt:main' into s390x-rpms

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[kubevirt-bot]

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[awels]

Did a quick review of the changes, and I see no real issues here. Only that there will be no support for importing from oVirt imageio and VMWare due to there not being dependencies for s390x for those sources.

[kubevirt-bot]

PR needs rebase.

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[cfilleke]

superseded by #3286