Refractor utils.py for LightGBM to follow K8s pattern

[karthikv2k]

@abhi-g 's comment reg https://github.com/kubeflow/fairing/pull/259

At a high level the code to support distribution looks correct. But I feep like majority of the utils code looks like can fit an existing k8s pattern such as an operator? If so, can you please add a todo comment to rewrite the code with that pattern. It should be possible to implement in Python as well.

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