[llvm] Expanding the Histogram Intrinsic (PR #127399)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> It would be good to add the intrinsics together with initial lowering as separate patch, including codegen tests.

It would still be good to separate the changes for adding the new intrinsics from using them in LV. Also the description/titl needs updating.

https://github.com/llvm/llvm-project/pull/127399