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

[via llvm-commits]

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@@ -3486,7 +3478,7 @@ void VPlanTransforms::handleUncountableEarlyExit(VPBasicBlock *EarlyExitingVPBB,
     if (ExitIRI->getNumOperands() != 1) {
       // The first of two operands corresponds to the latch exit, via MiddleVPBB
       // predecessor. Extract its last lane.
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ayalz wrote:

```suggestion
      // predecessor. Extract its final lane.
```

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