[llvm] [SLP]Remove operands upon marking instruction for deletion. (PR #97409)

[Mikael Holmén via llvm-commits]

mikaelholmen wrote:

Another crash bisected to this patch:
```opt -passes=slp-vectorizer bbi-97294.ll -o /dev/null```

It still crashes on current top of tree 015526bf3fc68 .

[bbi-97294.ll.gz](https://github.com/user-attachments/files/16155883/bbi-97294.ll.gz)



https://github.com/llvm/llvm-project/pull/97409