fix: remove parent dir in DeleteVolume

[andyzhangx]

What type of PR is this? /kind bug

What this PR does / why we need it: fix: remove parent dir in DeleteVolume

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

``` [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.821458 1 utils.go:76] GRPC call: /csi.v1.Controller/DeleteVolume [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.821498 1 utils.go:77] GRPC request: {"secrets":"***stripped***","volume_id":"smb-server.default.svc.cluster.local/share#smb-6446/pvc-t8w7t#pvc-537d3618-595b-4796-81f6-794effd6d54e#"} [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.821684 1 controllerserver.go:169] DeleteVolume: found mountOptions(dir_mode=0777,file_mode=0777,uid=0,gid=0,mfsymlinks) for volume(smb-server.default.svc.cluster.local/share#smb-6446/pvc-t8w7t#pvc-537d3618-595b-4796-81f6-794effd6d54e#) [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.821757 1 controllerserver.go:189] begin to delete or archive subdirectory since secret is provided [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.821931 1 controllerserver.go:330] internally mounting //smb-server.default.svc.cluster.local/share at /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.822328 1 nodeserver.go:209] NodeStageVolume: targetPath(/tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e) volumeID(smb-server.default.svc.cluster.local/share#smb-6446/pvc-t8w7t#pvc-537d3618-595b-4796-81f6-794effd6d54e#) context(map[source://smb-server.default.svc.cluster.local/share]) mountflags([dir_mode=0777,file_mode=0777,uid=0,gid=0,mfsymlinks file_mode=0777]) mountOptions([dir_mode=0777,file_mode=0777,uid=0,gid=0,mfsymlinks file_mode=0777]) [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.822750 1 mount_linux.go:218] Mounting cmd (mount) with arguments (-t cifs -o dir_mode=0777,file_mode=0777,uid=0,gid=0,mfsymlinks,file_mode=0777, //smb-server.default.svc.cluster.local/share /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e) [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.867097 1 nodeserver.go:241] volume(smb-server.default.svc.cluster.local/share#smb-6446/pvc-t8w7t#pvc-537d3618-595b-4796-81f6-794effd6d54e#) mount "//smb-server.default.svc.cluster.local/share" on "/tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e" succeeded [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.867414 1 controllerserver.go:242] removing subdirectory at /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e/smb-6446 on internalVolumePath /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e/smb-6446/pvc-t8w7t [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.873482 1 controllerserver.go:348] internally unmounting /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.873510 1 nodeserver.go:264] NodeUnstageVolume: CleanupMountPoint on /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e with volume smb-server.default.svc.cluster.local/share#smb-6446/pvc-t8w7t#pvc-537d3618-595b-4796-81f6-794effd6d54e# [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.873578 1 mount_helper_common.go:93] unmounting "/tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e" (corruptedMount: false, mounterCanSkipMountPointChecks: true) [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.873597 1 mount_linux.go:360] Unmounting /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.879301 1 mount_helper_common.go:150] Deleting path "/tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e" [pod/csi-smb-controller-794dfcb554-sd6gc/smb] I0915 05:07:46.879522 1 nodeserver.go:273] NodeUnstageVolume: unmount volume smb-server.default.svc.cluster.local/share#smb-6446/pvc-t8w7t#pvc-537d3618-595b-4796-81f6-794effd6d54e# on /tmp/pvc-537d3618-595b-4796-81f6-794effd6d54e successfully ```

Does this PR introduce a user-facing change?:

fix: remove parent dir in DeleteVolume

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes-csi/csi-driver-smb/blob/master/OWNERS)~~ [andyzhangx] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[coveralls]

Pull Request Test Coverage Report for Build 10868039423

Details

• 9 of 11 (81.82%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.009%) to 78.914%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/smb/controllerserver.go	5	7	71.43%
<!--	Total:	9	11	81.82%	-->

Totals
Change from base Build 10867357119:	0.009%
Covered Lines:	988
Relevant Lines:	1252

---

💛 - Coveralls

[andyzhangx]

/retest