This test creates an invalid vector cost, but #181731 allows
transforming of lshr 0, 0 -> add 0, 0 which in turn allows costing of
the following TreeEntry since is will be considered as 4 `ADD`
operations.
```
%lshr.1 = lshr i96 0, 0
%lshr.2 = lshr i96 0, 0
%add.0 = add i96 0, 0
%add.1 = add i96 0, 0
```
This commit adjusts the operands to ensure an invalid cost is still
generated after #181731.
This test was originally added in
4652ec0e291ca4ba4ddef3fd59b202646e9a6694.
fe86f612f7