[llvm] [VPlan] Don't replicate extractvalues that would require extracting lanes from a struct (PR #219941)

[Florian Hahn via llvm-commits]

https://github.com/fhahn approved this pull request.

LGTM, thanks.

I am not 100% sure if that's the best place to put this, but we can revisit if needed.

Just one suggestion for an additional tests

https://github.com/llvm/llvm-project/pull/219941