[llvm] [VPlan] Model FOR resume value extraction in VPlan. (PR #93396)

[via llvm-commits]

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

This looks good to me, thanks! Added last minor comments, including a need for clang-format. Commit message can add that the phi in the scalar pre-header that routes the resume value is destined to be modeled in VPlan,

https://github.com/llvm/llvm-project/pull/93396