Automatic merge from submit-queue (batch tested with PRs 62676, 62612). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

fix WaitForAttach failure issue for azure disk

**What this PR does / why we need it**:
From v1.10, `devicePath` will be updated due to following code change:
https://github.com/kubernetes/kubernetes/blob/568afb4ecca99bc3b54fddc20927b3713369d357/pkg/volume/util/operationexecutor/operation_generator.go#L517-L518

So in v1.10.0, MountVolume.WaitForAttach will fail in the azure disk remount, error logs would be like following:
```
MountVolume.WaitForAttach failed for volume "pvc-f1562ecb-3e5f-11e8-ab6b-000d3af9f967" : azureDisk - Wait for attach expect device path as a lun number, instead got: /dev/disk/azure/scsi1/lun1 (strconv.Atoi: parsing "/dev/disk/azure/scsi1/lun1": invalid syntax)
  Warning  FailedMount             1m (x10 over 21m)   kubelet, k8s-agentpool-66825246-0  Unable to mount volumes for pod  
```

This PR does not use `devicePath` anymore since it could be changed, instead, it use `diskController.GetDiskLun(diskName, volumeSource.DataDiskURI, nodeName)` to get disk LUN, this ARM api call would cost about 0.12s

The GCE disk won't have this issue since `devicePath` is not used in [WaitForAttach func](https://github.com/kubernetes/kubernetes/blob/master/pkg/volume/gce_pd/attacher.go#L133), while aws disk is also using `devicePath`  in [WaitForAttach func](https://github.com/kubernetes/kubernetes/blob/master/pkg/volume/aws_ebs/attacher.go#L145), I think there is potentical issue for aws_ebs

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #62540

**Special notes for your reviewer**:
should cherry-pick to v1.10

**Release note**:

```
fix WaitForAttach failure issue for azure disk
```
/assign @feiskyer 
/sig azure

FYI @khenidak