[llvm] [LV][NFC] Autogen a test with integer costs per lane (PR #201560)

[David Sherwood via llvm-commits]

david-arm wrote:

This buildbot failure shows another example of why it would be useful to have the -print-int-costs-per-lane flag: https://lab.llvm.org/buildbot/#/builders/193/builds/16567

https://github.com/llvm/llvm-project/pull/201560