fix: healing of replication delete markers (#13933)

A corner case can occur where the delete-marker was propagated 
but the metadata could not be updated on the primary. Sending 
a RemoveObject call with the Delete marker version would end 
up permanently deleting the version on target. Instead, perform 
a Stat on the delete-marker version on target and redo replication 
only if the delete-marker is missing on target.

cmd/data-scanner.go

@@ -1269,6 +1269,7 @@ func (i *scannerItem) healReplicationDeletes(ctx context.Context, o ObjectLayer,
 				DeleteMarker:          roi.DeleteMarker,
 			},
 			Bucket: roi.Bucket,
+			OpType: replication.HealReplicationType,
 		}
 		if roi.ExistingObjResync.mustResync() {
 			doi.OpType = replication.ExistingObjectReplicationType