[18.0-fr1] Add missing node groups for multicell nodeset

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2485

/assign viroel

[openshift-ci]

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[github-actions]

Thanks for the PR! ❤️
I'm marking it as a draft, once your happy with it merging and the PR is passing CI, click the "Ready for review" button below.

[lewisdenny]

@viroel I think you created this to work around the D/S Zuul error that was fixed by not importing this branch in D/S Zuul?

@bogdando I see the linked Jira is targeting FR2, does this need to be back ported to FR1 branch?

[bogdando]

@lewisdenny no need to backport, ther ain't gonna be multicell in FR1

albeit, merging it won't hurt - just a noop