This was broken back in #43637 when the logic in
`(*StatefulSetTester).CreateStatefulSet` switched from using
`generated.ReadOrDie` to read the entire service.yaml file and pass it
to kubectl to using `manifest.SvcFromManifest`, which assumes that the
file contains only a single service.
Fixes#52750
...by removing the liveness/readiness probes from the cockroachdb
manifests, as explained in
github.com/kubernetes/test-infra/issues/1740#issuecomment-279555187