[llvm] [LoopVectorize][NFC] Rewrite tests to check output of vplan cost model (PR #113697)

[David Sherwood via llvm-commits]

david-arm wrote:

Hi @fhahn, yes that's quite possible. Looks like I'm being punished for trying to produce more accurate reporting. :) I'll put in a fix asap or revert. For now the fix is probably to round to an integer value until I can fix it in a better way.

https://github.com/llvm/llvm-project/pull/113697