Merge pull request #45345 from codablock/storageclass_fstype

Automatic merge from submit-queue (batch tested with PRs 45345, 49470, 49407, 49448, 49486)

Support "fstype" parameter in dynamically provisioned PVs

This PR is a replacement for https://github.com/kubernetes/kubernetes/pull/40805. I was not able to push fixes and rebases to the original branch as I don't have access to the Github organization anymore.

I assume the PR will need a new "ok to test" 

**ORIGINAL PR DESCRIPTION**

**What this PR does / why we need it**: This PR allows specifying the desired FSType when dynamically provisioning volumes with storage classes. The FSType can now be set as a parameter:
```yaml
kind: StorageClass
apiVersion: storage.k8s.io/v1beta1
metadata:
  name: test
provisioner: kubernetes.io/azure-disk
parameters:
  fstype: xfs
```

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #37801

**Special notes for your reviewer**:
The PR also implicitly adds checks for unsupported parameters.

**Release note**:

```release-note
Support specifying of FSType in StorageClass
```

pkg/volume/rbd/rbd.go

@@ -275,6 +275,7 @@ func (r *rbdVolumeProvisioner) Provision() (*v1.PersistentVolume, error) {
 	secretName := ""
 	secret := ""
 	imageFormat := rbdImageFormat1
+	fstype := ""
 
 	for k, v := range r.options.Parameters {
 		switch dstrings.ToLower(k) {
@@ -306,6 +307,8 @@ func (r *rbdVolumeProvisioner) Provision() (*v1.PersistentVolume, error) {
 					r.imageFeatures = append(r.imageFeatures, f)
 				}
 			}
+		case volume.VolumeParameterFSType:
+			fstype = v
 		default:
 			return nil, fmt.Errorf("invalid option %q for volume plugin %s", k, r.plugin.GetPluginName())
 		}
@@ -353,6 +356,7 @@ func (r *rbdVolumeProvisioner) Provision() (*v1.PersistentVolume, error) {
 	rbd.SecretRef = new(v1.LocalObjectReference)
 	rbd.SecretRef.Name = secretName
 	rbd.RadosUser = r.Id
+	rbd.FSType = fstype
 	pv.Spec.PersistentVolumeSource.RBD = rbd
 	pv.Spec.PersistentVolumeReclaimPolicy = r.options.PersistentVolumeReclaimPolicy
 	pv.Spec.AccessModes = r.options.PVC.Spec.AccessModes