cluster-api-push-images-nightly job is failing

[sbueringer]

Just got a mail that our nightly image push job doesn't work anymore.

See: https://testgrid.k8s.io/sig-cluster-lifecycle-image-pushes#cluster-api-push-images-nightly

Looks like this was caused by #7135 and the new image doesn't contain gsutil anymore.

P.S. post-cluster-api-push-images still works because it doesn't use gsutil.

/kind bug
[One or more /area label. See https://github.com/kubernetes-sigs/cluster-api/labels?q=area for the list of labels]

[k8s-ci-robot]

@sbueringer: This issue is currently awaiting triage.

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[chrischdi]

Seems to be a regression via kubernetes/test-infra@b5133ab which did remove the following command which lead to an installed gsutil binary:

/google-cloud-sdk/install.sh \
        --disable-installation-options \
        --bash-completion=false \
        --path-update=false \
        --usage-reporting=false

[chrischdi]

Adding gsutil to the command gcloud components install ... in https://github.com/kubernetes/test-infra/blob/master/images/gcb-docker-gcloud/Dockerfile#L41 would install it again. However I was not able to get context of it getting deleted on purpose (at the PR).

[sbueringer]

Let's open an issue in test-infra an cc author/reviewers of this PR

Or maybe just open a PR cc them and let's see what happens :)