Katib: [Documentation] Metrics strategies information

[andreyvelich]

/kind feature

We should document how user can specify MetricStrategies in Experiment.

/cc @sperlingxx @johnugeorge @gaocegege

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[sperlingxx]

Great idea! And I can take this job if necessary.

[gaocegege]

LGTM

[andreyvelich]

That would be awesome, thanks @sperlingxx!
I think you can submit PR directly to Kubeflow website.

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[andreyvelich]

/area release
/priority p1