[llvm] [VPlan] Replace ExtractLast(Elem|LanePerPart) with ExtractLast(Lane/Part) (PR #164124)

[via llvm-commits]

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@@ -1405,7 +1403,7 @@ class VPIRInstruction : public VPRecipeBase {
   /// Update the recipes first operand to the last lane of the operand using \p
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ayalz wrote:

```suggestion
  /// Update the recipe's first operand to the final lane of the operand using \p
```

https://github.com/llvm/llvm-project/pull/164124