[feature] Support SuccessPolicy/FailurePolicy Based on % of Succeeded/Failed Workers

[gaocegege]

We now support allworkers in success/failure policy. Users want to make the Job succeeded/failed based on the percentage of the succeeded/failed workers. I think we can support it in the operator side.

/cc @DeliangFan @terrytangyuan @ChanYiLin

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Label	Probability
area/operator	0.61
feature	0.99

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[gaocegege]

/priority p1

[gaocegege]

We think a Job failed when:

• Chief fails (it reaches backofflimit) or
• Any PS fails (it reaches backofflimit) or
• percentage of workers (they all reach backofflimit) fail

[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.