[release-1.30] fix: unmount volume issue on Windows node

[andyzhangx]

What type of PR is this?
/kind bug

What this PR does / why we need it:
fix: unmount volume issue on Windows node, original behavior is just deleting the mounted directory which may lead to mount failure in frequent unmount and mount the same volume on the same node

cherrypick of #2691

I1204 14:39:28.920234    1336 utils.go:105] GRPC call: /csi.v1.Node/NodeUnpublishVolume
I1204 14:39:28.920234    1336 utils.go:106] GRPC request: {"target_path":"c:\\var\\lib\\kubelet\\pods\\d17b945a-2f91-4bfc-b5c9-28e886c86525\\volumes\\kubernetes.io~csi\\pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682\\mount","volume_id":"/subscriptions/b9d2281e-dcd5-4dfd-9a97-0d50377cdf76/resourceGroups/MC_andy-aks129_andy-aks129_eastus2/providers/Microsoft.Compute/disks/pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682"}
I1204 14:39:28.920916    1336 nodeserver.go:300] NodeUnpublishVolume: unmounting volume /subscriptions/b9d2281e-dcd5-4dfd-9a97-0d50377cdf76/resourceGroups/MC_andy-aks129_andy-aks129_eastus2/providers/Microsoft.Compute/disks/pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682 on c:\var\lib\kubelet\pods\d17b945a-2f91-4bfc-b5c9-28e886c86525\volumes\kubernetes.io~csi\pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682\mount
I1204 14:39:28.920916    1336 nodeserver.go:310] NodeUnpublishVolume: unmount volume /subscriptions/b9d2281e-dcd5-4dfd-9a97-0d50377cdf76/resourceGroups/MC_andy-aks129_andy-aks129_eastus2/providers/Microsoft.Compute/disks/pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682 on c:\var\lib\kubelet\pods\d17b945a-2f91-4bfc-b5c9-28e886c86525\volumes\kubernetes.io~csi\pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682\mount successfully
I1204 14:39:28.920916    1336 utils.go:112] GRPC response: {}
I1204 14:39:29.034346    1336 utils.go:105] GRPC call: /csi.v1.Node/NodeUnstageVolume
I1204 14:39:29.034346    1336 utils.go:106] GRPC request: {"staging_target_path":"\\var\\lib\\kubelet\\plugins\\kubernetes.io\\csi\\disk.csi.azure.com\\fef91c0445c24e34b58d31008ed7020a6502e7017b09a1b5b7012d4e3d28a1f6\\globalmount","volume_id":"/subscriptions/b9d2281e-dcd5-4dfd-9a97-0d50377cdf76/resourceGroups/MC_andy-aks129_andy-aks129_eastus2/providers/Microsoft.Compute/disks/pvc-6afee86b-e9b9-4e63-a8a0-d49b887fd682"}
I1204 14:39:29.034346    1336 nodeserver.go:201] NodeUnstageVolume: unmounting \var\lib\kubelet\plugins\kubernetes.io\csi\disk.csi.azure.com\fef91c0445c24e34b58d31008ed7020a6502e7017b09a1b5b7012d4e3d28a1f6\globalmount
I1204 14:39:29.035850    1336 safe_mounter_host_process_windows.go:69] Unmounting volume \\?\Volume{6a72717b-3413-4f50-a487-f46516fdb617}\ from \var\lib\kubelet\plugins\kubernetes.io\csi\disk.csi.azure.com\fef91c0445c24e34b58d31008ed7020a6502e7017b09a1b5b7012d4e3d28a1f6\globalmount
I1204 14:39:31.313932    1336 nodeserver.go:205] NodeUnstageVolume: unmount \var\lib\kubelet\plugins\kubernetes.io\csi\disk.csi.azure.com\fef91c0445c24e34b58d31008ed7020a6502e7017b09a1b5b7012d4e3d28a1f6\globalmount successfully
I1204 14:39:31.314177    1336 utils.go:112] GRPC response: {}

Which issue(s) this PR fixes:

Fixes #2690

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

fix: unmount volume issue on Windows node

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx

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[k8s-ci-robot]

@andyzhangx: 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-azuredisk-csi-driver-external-e2e-single-az	df1ee69	link	true	/test pull-azuredisk-csi-driver-external-e2e-single-az

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