Automatic merge from submit-queue. 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>.

remove time waiting after create storage account (save 25s)

**What this PR does / why we need it**:
I found azure cloud provider will always sleep 25 seconds after creating a new azure storage account:
https://github.com/kubernetes/kubernetes/blob/master/pkg/cloudprovider/providers/azure/azure_blobDiskController.go#L531
Actually it's not necessary now, since it's already using sync way to create a storage account:
https://github.com/kubernetes/kubernetes/blob/master/pkg/cloudprovider/providers/azure/azure_blobDiskController.go#L531
Above code will wait until the storage account is created in azure.

**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 #56674

**Special notes for your reviewer**:
Below are logs without this PR:
```
I1201 06:41:22.486663       1 azure_blobDiskController.go:522] azureDisk - Creating storage account pvc3329812692002 type Standard_LRS
I1201 06:41:22.486810       1 azure_blobDiskController.go:531] azureDisk - Creating storage account pvc3329812692002 type Standard_LRS begin to wait
I1201 06:41:40.440005       1 azure_blobDiskController.go:533] azureDisk - Creating storage account pvc3329812692002 type Standard_LRS end wait
I1201 06:41:40.440030       1 azure_blobDiskController.go:551] azureDisk - storage account pvc3329812692002 was just created, allowing time before polling status
I1201 06:42:05.440176       1 azure_blobDiskController.go:553] azureDisk - storage account pvc3329812692002 was just created, allowing time before polling status, end wait
```

Below are logs with this PR, it could save 25s now:
```
I1201 07:36:07.755540       1 azure_blobDiskController.go:523] azureDisk - Creating storage account pvc33298126923895004820 type Standard_LRS
I1201 07:36:07.755652       1 azure_blobDiskController.go:532] azureDisk - Creating storage account pvc33298126923895004820 type Standard_LRS begin to wait
I1201 07:36:25.722540       1 azure_blobDiskController.go:534] azureDisk - Creating storage account pvc33298126923895004820 type Standard_LRS end wait
I1201 07:36:25.722557       1 azure_blobDiskController.go:552] azureDisk - storage account pvc33298126923895004820 was just created, allowing time before polling status
I1201 07:36:25.722562       1 azure_blobDiskController.go:554] azureDisk - storage account pvc33298126923895004820 was just created, allowing time before polling status, end wait
I1201 07:36:26.011157       1 azure_blobDiskController.go:436] azureDisk - storage account:pvc33298126923895004820 had no default container(3329812692) and it was created
I1201 07:36:26.011201       1 azure_blobDiskController.go:182] azureDisk - creating page blob andy-mgwin1710-dynamic-pvc-88c50c37-d668-11e7-94dc-000d3a041274.vhd in container 3329812692 account pvc33298126923895004820
```
**Release note**:

```
none
```
/sig azure
/assign @khenidak