Add helm charts for training operator #1613

Job	Run time
Publish Image (kubectl-delivery, build/images/kubectl-delivery/Dockerfile, linux/amd64,linux/arm6... / Publish Image	1m 11s
Publish Image (storage-initializer, sdk/python/kubeflow/storage_initializer/Dockerfile, sdk/pytho... / Publish Image	9m 57s
Publish Image (trainer-huggingface, sdk/python/kubeflow/trainer/Dockerfile, sdk/python/kubeflow/t... / Publish Image	14m 3s
Publish Image (training-operator, build/images/training-operator/Dockerfile, linux/amd64,linux/ar... / Publish Image	26m 21s
Publish Image (training-operator, cmd/training-operator.v2alpha1/Dockerfile, linux/amd64,linux/ar... / Publish Image	17m 11s
	1h 8m 43s

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