[llvm] [LV][NFC] Fix force-scalable-vectorization-always.ll (PR #201580)

[David Sherwood via llvm-commits]

david-arm wrote:

Once https://github.com/llvm/llvm-project/pull/201560 (or the relevant part of that PR) I should be able to re-enable autogeneration of CHECK lines in the test.

https://github.com/llvm/llvm-project/pull/201580