Test new node image built with DIB

[NymanRobin]

This PR is mainly meant to test the new image built with Disk Image builder in this PR:
#679

[metal3-io-bot]

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[Sunnatillo]

/test-centos-integration-release-1-6
/test-ubuntu-e2e-integration-main

[NymanRobin]

Thanks @Sunnatillo for running the tests, but seems like I missed this comment
# Kubectl version (do not forget to update KUBECTL_SHA256 when changing KUBERNETES_VERSION!)

But maybe just hard coding the image directly would work, but I will check this in a bit more detail if you do not already know?

[Sunnatillo]

Lets run this on project infra and manually set all the vars there.

[NymanRobin]

/test-centos-integration-release-1-6
/test-ubuntu-e2e-integration-main

[metal3-io-bot]

PR needs rebase.

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[NymanRobin]

This can be closed as the changes are done already in #1389