print typed podlist for correct serialization

[juanvallejo]

Related BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1473455
Backporting #15411

cc @deads2k @fabianofranz

[liggitt]

/lgtm
/approve no-issue

[liggitt]

[WARNING] !!! gofmt needs to be run on the following files: 
./pkg/cmd/admin/node/listpods.go
[FATAL] Try running 'gofmt -s -d [path]'
[FATAL] Or autocorrect with 'hack/verify-gofmt.sh | xargs -n 1 gofmt -s -w'

[joelsmith]

/test extended_conformance_install_update
/test verify

[joelsmith]

So this missed getting in for 3.6 because of a missing gofmt run on the changed code?

[liggitt]

yes, and is still needed

[juanvallejo]

@liggitt wondering if you could tag once more, thanks

[liggitt]

/lgtm

[openshift-merge-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: juanvallejo, liggitt

Associated issue requirement bypassed by: liggitt

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[fabianofranz]

Good to merge.