Automatic merge from submit-queue (batch tested with PRs 63348, 63839, 63143, 64447, 64567). 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>.

Add block volume support to internal provisioners.

**What this PR does / why we need it**:
Internal provisioners now create filesystem PVs when block PVs are requested. This leads to unbindable PVCs.

In this PR, volume plugins that support block volumes provision block PVs when block is requested. All the other provisioners return clear error in `kubectl describe pvc`:

```
Events:
  Type     Reason              Age               From                         Message
  ----     ------              ----              ----                         -------
  Warning  ProvisioningFailed  7s (x2 over 18s)  persistentvolume-controller  Failed to provision volume with StorageClass "standard": kubernetes.io/cinder does not support block volume provisioning

```

```release-note
NONE
```

cc @kubernetes/vmware for vsphere changes
cc @andyzhangx for Azure changes

/assign @copejon @mtanino