Automatic merge from submit-queue (batch tested with PRs 49870, 49416, 49872, 49892, 49908)

FC volume plugin: remove block device at DetachDisk

**What this PR does / why we need it**:

After a volume is unmounted from pod and worker node, and then PV and PVC are deleted, cluster admin or external-provisioner might delete the disk from storage, therefore block device on the node should be cleaned up beforehand.

The photon volume plugin already has same functionality.

**Which issue this PR fixes**: fixes #49392

**Special notes for your reviewer**:

/assign @rootfs  
/cc @jsafrane @saad-ali 

**Release note**:

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NONE
```