[#789] shard: Exclude object.ErrAlreadyRemoved errors in refillMetabase

Tombstone and "alive" objects can be both stored in BlobStor. They can
appear during iterating in different order. Metabase returns
`ErrAlreadyRemoved` error if object is inhumed.

Ignore `object.ErrAlreadyRemoved` errors of `metabase.Put`in Shard's
`refillMetabase` operation.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/local_object_storage/shard/control.go

@@ -116,7 +116,12 @@ func (s *Shard) refillMetabase() error {
 			}
 		}
 
-		return meta.Put(s.metaBase, obj, blzID)
+		err := meta.Put(s.metaBase, obj, blzID)
+		if err != nil && !errors.Is(err, object.ErrAlreadyRemoved) {
+			return err
+		}
+
+		return nil
 	})
 }