[llvm] [VPlan] Add exit phi operands during initial construction (NFC). (PR #136455)

[via llvm-commits]

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@@ -9368,8 +9368,7 @@ static void addScalarResumePhis(VPRecipeBuilder &Builder, VPlan &Plan,
   }
 }
 
-// Collect VPIRInstructions for phis in the exit blocks that are modeled
-// in VPlan and add the exiting VPValue as operand.
+// Collect VPIRInstructions for phis in the exit block from the latch only.
 static SetVector<VPIRInstruction *>
 collectUsersInExitBlocks(Loop *OrigLoop, VPRecipeBuilder &Builder,
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ayalz wrote:

```suggestion
collectUsersInLatchExitBlock(Loop *OrigLoop, VPRecipeBuilder &Builder,
```
?

https://github.com/llvm/llvm-project/pull/136455