[llvm] [MachineSink] Drop debug info for instructions deleted by sink-and-fold (PR #71443)

[Momchil Velikov via llvm-commits]

momchil-velikov wrote:

This is intended to fix the issue in https://github.com/llvm/llvm-project/pull/67432#issuecomment-1777816079

@bgra8 

https://github.com/llvm/llvm-project/pull/71443