Some sparse tests failing on scipy 1.16

### Description

Marked as skip here https://github.com/pymc-devs/pytensor/commit/2ab60b39e4622b1d9d677ab3e598d752bd25b17e

I didn't have time to check the reason behind it. It seems scipy is more strict about indptr lengths, and in the gradient we get some cases where the indptr is longer than the rows it has. Perhaps something we can tweak in the perform level