azure: Get node info from node labels for CSI driver

[hakman]

azure_disk_utils.go:155] reading cloud config from secret kube-system/azure-cloud-provider
azure_disk_utils.go:165] InitializeCloudFromSecret: failed to get cloud config from secret kube-system/azure-cloud-provider: secrets "azure-cloud-provider" not found
azure_disk_utils.go:174] could not read cloud config from secret kube-system/azure-cloud-provider
azure_disk_utils.go:177] AZURE_CREDENTIAL_FILE env var set as /etc/kubernetes/cloud.config
azure_disk_utils.go:188] load azure config from file(/etc/kubernetes/cloud.config) failed with open /etc/kubernetes/cloud.config: no such file or directory
azure_disk_utils.go:194] no cloud config provided, error: open /etc/kubernetes/cloud.config: no such file or directory, driver will run without cloud config

/cc @rifelpet

[k8s-ci-robot]

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[hakman]

/test pull-kops-e2e-azure-cni-cilium

[hakman]

/test pull-kops-e2e-azure-cni-cilium

[hakman]

/test pull-kops-e2e-azure-cni-cilium

[hakman]

/test pull-kops-e2e-azure-cni-cilium

[k8s-ci-robot]

@hakman: The following tests 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-kops-aws-upgrade-k133-ko133-to-kstable-kolatest-many-addons	4a726f9	link	false	/test pull-kops-aws-upgrade-k133-ko133-to-kstable-kolatest-many-addons
pull-kops-aws-upgrade-k134-ko134-to-kstable-kolatest-many-addons	4a726f9	link	false	/test pull-kops-aws-upgrade-k134-ko134-to-kstable-kolatest-many-addons
pull-kops-aws-upgrade-k135-ko135-to-kstable-kolatest-many-addons	4a726f9	link	false	/test pull-kops-aws-upgrade-k135-ko135-to-kstable-kolatest-many-addons
pull-kops-e2e-k8s-gce-cilium	4a726f9	link	true	/test pull-kops-e2e-k8s-gce-cilium
pull-kops-e2e-azure-cni-cilium	4a726f9	link	true	/test pull-kops-e2e-azure-cni-cilium

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.

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[rifelpet]

/lgtm