chore: reduce node LIST APIs in cloud-node-manager

[feiskyer]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Refer the codes below, cloud-node-manager is querying the node every 5 minutes to reconcile its addresses, but this API call is not actually required as there's already informers:

cloud-provider-azure/pkg/nodemanager/nodemanager.go

Lines 178 to 181 in 0e8ef48

	nodes, err := cnc.kubeClient.CoreV1().Nodes().List(context.TODO(), metav1.ListOptions{
	ResourceVersion: "0",
	FieldSelector: fields.OneTermEqualSelector("metadata.name", cnc.nodeName).String(),
	})

Hence, this PR replaces the node LIST with informer LIST, which would reduce the API calls to apiserver.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

chore: reduce node LIST APIs in cloud-node-manager

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

[k8s-ci-robot]

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[coveralls]

Coverage increased (+0.06%) to 80.009% when pulling a3d7453 on feiskyer:reduce-client-list into 0e640ad on kubernetes-sigs:master.

[feiskyer]

/hold

[feiskyer]

/hold cancel

Ready for review now.

[nilo19]

/lgtm

[jackfrancis]

Hi @feiskyer @nilo19 can we cut patch releases with this fix ASAP?

Thanks!

[feiskyer]

@jackfrancis we have another set of cherry-picks. Need to wait for them

[feiskyer]

@jackfrancis v1.23.2, v1.1.5 and v1.0.9 have been released with this change.

[jackfrancis]

Thank you @feiskyer!

cc @JohnRusk