Increase lscratch allocation for RemoveBL

@lobanov
> I had some failures with "RemoveBL" step, presumably running out of lscratch space (third row). Can we increase it in the next iteration?

<img width="1620" height="1320" alt="Image" src="https://github.com/user-attachments/assets/0b443df1-8e27-4103-82c2-7b63a4147bef" />