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

[David Green via llvm-commits]

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@@ -6,7 +6,6 @@ target triple = "aarch64--linux-gnu"
 
 ; CHECK-LABEL: all_scalar
 ; CHECK:       LV: Found scalar instruction: %i.next = add nuw nsw i64 %i, 2
-; CHECK:       LV: Found an estimated cost of 1 for VF 2 For instruction: %i.next = add nuw nsw i64 %i, 2
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davemgreen wrote:

Could this test the cost of "induction instruction"

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