✨ Add junit output to e2e tests

[mdbooth]

Makes e2e output look like this:

[k8s-ci-robot]

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[huxcrux]

/lgtm

[lentzi90]

Where/how can I see this?

[mdbooth]

Where/how can I see this?

In the e2e output, but only after it finishes. The example in the description is here: https://prow.k8s.io/view/gs/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_cluster-api-provider-openstack/1930/pull-cluster-api-provider-openstack-e2e-test/1766042764845256704

[mdbooth]

This e2e test seems to have become wedged.

/test pull-cluster-api-provider-openstack-e2e-test