[Feature Request] Provides a better common logger

[Jeffwan]

Currently, kubeflow/common provides a logger utils for operator to use. It uses github.com/sirupsen/logrus underneath.

https://github.com/kubeflow/common/blob/master/pkg/util/logger.go#L20

The problem I notice is new operators using kubebuilder have inbuilt logger for operator logics.
This makes the logs really messy.

Can we provide a interface layer like logr and provide method like SetLogger and different operator can use their own implementation?

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[terrytangyuan]

Agreed. Having a unified interface would make it easier for downstream apps to consume the logs.

[terrytangyuan]

cc @ShuhanYan @carmark in case you are interested