If labels are not specified on a Job, kubernetes defaults them
to include the labels of their underlying Pod template. Helm 3
injects metadata into all resources [0] including a
`app.kubernetes.io/managed-by: Helm` label. Thus when kubernetes
sees a Job's labels they are no longer empty and thus do not get
defaulted to the underlying Pod template's labels. This is a
problem since Job labels are depended on by
- Armada pre-upgrade delete hooks
- Armada wait logic configurations
- kubernetes-entrypoint dependencies
Thus, for Job templates previously missed, this adds labels matching
the underlying Pod template to retain the same labels that were
present with Helm 2.
[0]: https://github.com/helm/helm/pull/7649
Change-Id: Ie438b449a3d9853d786215d40a39c32d164e9950
7803000a54