Add binding error message for volumeMode:Block unsupported case

This commit adds a binding error message for volumeMode:Block
unsupported case.
With this message, users can understand why PV is not bound to
PVC on both dynamic provisioning and manually creating volume.

This patch works as follows:

- In syncVolume, before adding the claim to claimQueue, check if
  there is a volumeMode mismatch, and if there is, record the
  event for both pv and pvc and skip adding to the queue.

fixes: #59942

pkg/controller/volume/persistentvolume/pv_controller.go

@@ -571,6 +571,17 @@ func (ctrl *PersistentVolumeController) syncVolume(volume *v1.PersistentVolume)
 			}
 			return nil
 		} else if claim.Spec.VolumeName == "" {
+			if isMisMatch, err := checkVolumeModeMisMatches(&claim.Spec, &volume.Spec); err != nil || isMisMatch {
+				// Binding for the volume won't be called in syncUnboundClaim,
+				// because findBestMatchForClaim won't return the volume due to volumeMode mismatch.
+				volumeMsg := fmt.Sprintf("Cannot bind PersistentVolume to requested PersistentVolumeClaim %q due to incompatible volumeMode.", claim.Name)
+				ctrl.eventRecorder.Event(volume, v1.EventTypeWarning, events.VolumeMismatch, volumeMsg)
+				claimMsg := fmt.Sprintf("Cannot bind PersistentVolume %q to requested PersistentVolumeClaim due to incompatible volumeMode.", volume.Name)
+				ctrl.eventRecorder.Event(claim, v1.EventTypeWarning, events.VolumeMismatch, claimMsg)
+				// Skipping syncClaim
+				return nil
+			}
+
 			if metav1.HasAnnotation(volume.ObjectMeta, annBoundByController) {
 				// The binding is not completed; let PVC sync handle it
 				glog.V(4).Infof("synchronizing PersistentVolume[%s]: volume not bound yet, waiting for syncClaim to fix it", volume.Name)