Encode dir obj names before expiration (#19305)

Object names of directory objects qualified for ExpiredObjectAllVersions
must be encoded appropriately before calling on deletePrefix on their
erasure set.

e.g., a directory object and regular objects with overlapping prefixes
could lead to the expiration of regular objects, which is not the 
intention of ILM. 

```
bucket/dir/ ---> directory object
bucket/dir/obj-1
```

When `bucket/dir/` qualifies for expiration, the current implementation would
remove regular objects under the prefix `bucket/dir/`, in this case,
`bucket/dir/obj-1`.

cmd/data-scanner.go

@@ -1240,7 +1240,7 @@ func applyExpiryOnNonTransitionedObjects(ctx context.Context, objLayer ObjectLay
 		}
 	}()
 
-	dobj, err = objLayer.DeleteObject(ctx, obj.Bucket, obj.Name, opts)
+	dobj, err = objLayer.DeleteObject(ctx, obj.Bucket, encodeDirObject(obj.Name), opts)
 	if err != nil {
 		if isErrObjectNotFound(err) || isErrVersionNotFound(err) {
 			return false
@@ -1261,7 +1261,9 @@ func applyExpiryOnNonTransitionedObjects(ctx context.Context, objLayer ObjectLay
 	if obj.DeleteMarker {
 		eventName = event.ObjectRemovedDeleteMarkerCreated
 	}
-
+	if lcEvent.Action.DeleteAll() {
+		eventName = event.ObjectRemovedDeleteAllVersions
+	}
 	// Notify object deleted event.
 	sendEvent(eventArgs{
 		EventName:  eventName,