Label Presets With VolumeMounts Break Multi-Container Jobs

[midnightconman]

If you add a label preset (that contains a volume / volume mount) to a prow job with multiple containers, the prow job will try to be created with multiple volume mounts and produce an error. Here is an example of the error we are seeing:

in cluster default: Pod "78d27f82-93de-4613-9425-7c5f9d8de17a" is invalid: spec.containers[2].volumeMounts[3].mountPath:
    Invalid value: "/root/.ssh/id_rsa": must be unique'