[test] update sample for katib (#730)
[test] update sample for katib (#730)

Update pip packages and remove the usage of
`dsl.ContainerOp`.

Signed-off-by: Yihong Wang <f520643bf8cff572a9eb593b2aa4ab3c892470e2@ibm.com>
kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton