🐛 util/GetGVKMetadata: fix get PartialObjectMetadata

[sbueringer]

Signed-off-by: Stefan Büringer [email protected]

What this PR does / why we need it:

Before this change the request always failed with the following log:

I0827 16:39:27.378997       1 conversion.go:67] controller-runtime/manager/controller/machineset "msg"="Cannot retrieve CRD with metadata only client, falling back to slower listing" "MachineSet"="name" "cluster.x-k8s.io"="reconciler kind" "default"=null "my-cluster-default-worker-topology-mqqb5-947bf9665"="namespace" "err"="failed to retrieve metadata from GVK resource: Object 'Kind' is missing in 'unstructured object has no kind'"

I synced the implementation with what I did for release-0.3 here: https://github.com/kubernetes-sigs/cluster-api/pull/5013/files

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 #

[fabriziopandini]

Nice catch!

/lgtm
/approve

[vincepri]

/approve
/lgtm

We should probably add some tests for these functions 😄

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini, vincepri

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[sbueringer]

/approve
/lgtm

We should probably add some tests for these functions 😄

The nice thing about the fallback is that everything still works :)