[llvm] [LV] Add tests for excluded cases in epiloge tail-folding (PR #217364)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

It would also be good to update the PR title + description. It does also add the logic to disable epilogue tail folding for the new tests

https://github.com/llvm/llvm-project/pull/217364