[feature] Support SchedulingPolicy in PyTorchJob

[gaocegege]

https://github.com/kubeflow/tf-operator/blob/master/pkg/controller.v1/pytorch/pytorchjob_controller.go#L164

SchedulingPolicy is not supported in PyTorchJob, we should implement it just like TFJob.

[Jeffwan]

I think It's due to some migration issue. The support should be easy, we just need to use job.spec.runPolicy directly as the argument for reconcileJobs because all jobs are migrated to use commonv1.RunPolicy now

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.