[llvm] [InterleavedAccessPass]: Ensure that dead nodes get erased only once (PR #122643)

[Hassnaa Hamdi via llvm-commits]

hassnaaHamdi wrote:

> Could it use SmallSetVector to store the Dead instructions? It should rule out any duplicated whilst keeping them in order, so that they are removed in the correct order.

I thought about this, but I found that there will be changes in other functions also.
but based on what @david-arm said, it seems that I will have to use SmallSetVector.
Thank you both.

https://github.com/llvm/llvm-project/pull/122643