Add MustIncludeAdditionalItemPVCs to help track BIA added PVC's PVB creation. (#10501)

* Add MustIncludeAdditionalItemPVCs structure in backup. It's used to track PVCs returned by BIA with mustIncluded annotaion and PVC is excluded from backup by global filter.
* Modfiy the volumeHelper interface to add a parameter function for ShouldPerformFSBackup.
* Modify to support fine-grained backup filters.
* Modify according to comments. Use a read-only interface to replace the parameter function.

Signed-off-by: Xun Jiang <xun.jiang@broadcom.com>

pkg/controller/backup_finalizer_controller.go

@@ -158,10 +158,11 @@ func (r *backupFinalizerReconciler) Reconcile(ctx context.Context, req ctrl.Requ
 	}
 
 	backupRequest := &pkgbackup.Request{
-		Backup:           backup,
-		StorageLocation:  location,
-		SkippedPVTracker: pkgbackup.NewSkipPVTracker(),
-		BackedUpItems:    pkgbackup.NewBackedUpItemsMap(),
+		Backup:                        backup,
+		StorageLocation:               location,
+		SkippedPVTracker:              pkgbackup.NewSkipPVTracker(),
+		BackedUpItems:                 pkgbackup.NewBackedUpItemsMap(),
+		MustIncludeAdditionalItemPVCs: pkgbackup.NewBackedUpItemsMap(),
 	}
 	var outBackupFile *os.File
 	if len(operations) > 0 {