SDK: Import all Kubernetes Models

[andreyvelich]

Fixes: #2110
Currently, we need to import all Kubernetes models to Katib SDK, so SDK can do proper deserialization.

We need to track better solution in: kubeflow/training-operator#1723

/assign @johnugeorge @tenzen-y @votti

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In response to this:

Fixes: #2110
Currently, we need to import all Kubernetes models to Katib SDK, so SDK can do proper deserialization.

We need to track better solution in: kubeflow/training-operator#1723

/assign @johnugeorge @tenzen-y @votti

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[tenzen-y]

Thanks @andreyvelich!

/lgtm
/approve

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