This is the track issue for Katib 0.12 release.
We should make the new release before Kubeflow 1.4 to deliver the latest Katib improvements.

TODOs list

• Fix problem with unused HPs: Grid Search stuck when parallelTrialCount < maxTrialCount #1534.
• Support XGBoostJob: Does katib support xgboost-operator? #1558.
• Support Argo Workflow: Support argo Workflow CRD as new trial kind #1081.
• Modify the default image for Katib UI.
• Update guides for the new Katib UI: [Documentation] Update guides for the New Katib UI  #1595.
• Remove Kubeflow training packages: Remove Kubeflow Training imports from go.mod #1596.
• Support Optuna in Katib: Add Optuna based suggestion service #1613.
• Fix UI bug when Trial template is empty: [UI] Unable to select Experiment parameters #1620.

@gaocegege @johnugeorge @yanniszark @kimwnasptd @jbottum Do we want to include anything else to this release ?

/area release
/priority p1