[llvm] [LV] Transform tests for early-exit with stores (PR #183288)

[Florian Hahn via llvm-commits]

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

LGTM, thanks!

I may have missed it, but it would also be good to make sure we have test cases were the latch and early exits exit to different blocks

https://github.com/llvm/llvm-project/pull/183288