cleanup: Use klog.Kobjs to format and print object information.

[zhifei92]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Use klog.Kobjs to format and print object information. Maintain a consistent code style.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

None

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: zhifei92
Once this PR has been reviewed and has the lgtm label, please assign feiskyer, janetkuo, sergeykanzhelev for approval. For more information see the Kubernetes Code Review Process.

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[k8s-ci-robot]

@zhifei92: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kubernetes-unit	21c1cf6	link	true	/test pull-kubernetes-unit

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.