🌱 Return the error from rest.HTTPClientFor instead of hiding it

[inteon]

Follow-up PR for #2122 (see #2122 (comment))

[k8s-ci-robot]

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[sbueringer]

/retitle 🌱 Return the error from rest.HTTPClientFor instead of hiding it

(I think we don't have to flag it as breaking)

[sbueringer]

/lgtm

/assign @alvaroaleman

[vincepri]

/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alvaroaleman, inteon

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