[llvm] Reland "[LV]: Teach LV to recursively (de)interleave." (PR #125094)

[Hassnaa Hamdi via llvm-commits]

hassnaaHamdi wrote:

@tstellar This patch is depending on another, I have created backport PR for the other one here #127101, once it gets merged, I will backport this one.

https://github.com/llvm/llvm-project/pull/125094