Add suspend semantics

[alculquicondor]

The semantics should be similar to that of k8s Job.

And this will pave the work for the training-operator (kubeflow/trainer#1519)

[tenzen-y]

/kind feature

[mimowo]

/assign

[tenzen-y]

@mimowo We have completed upgrading the kubernetes dependencies in #502.
It may help you implement suspend semantics.

[mimowo]

@tenzen-y @alculquicondor you may want to look at the WIP implementation (tested manually) here: #511. Any early feedback is welcome.

[tenzen-y]

Probably, we can close this issue.

[alculquicondor]

/close

[google-oss-prow]

@alculquicondor: Closing this issue.

In response to this:

/close

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