Since 1664600, manifests are built using `examples/kustomize.jsonnet`
instead of `example.jsonnet`.
This commit updates the dependencies in the `manifests` target to
reflect that change.
Since #132, `kube-rbac-proxy` resources can be configured in
`config.resources['kube-rbac-proxy']`, but the node-exporter daemonset
was still using hard-coded values.
This commit sets the request and limit resources to the configured
values for the `kube-rbac-proxy` container in the node-exporter pods.