[llvm] ValueTracking: introduce llvm::isNotCrossLaneOperation (PR #112011)

[Philip Reames via llvm-commits]

preames wrote:

Naming wise, isNotLaneCrossingOperation seems like a double negative.  I believe we've called this lane or element wise operations elsewhere, maybe isLanewiseOperation would be better?

https://github.com/llvm/llvm-project/pull/112011