[llvm] [LV][VPlan] Extract the implementation of transform Recipe to EVLRecipe into a small function. NFC (PR #119510)

[Florian Hahn via llvm-commits]

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@@ -1438,13 +1438,100 @@ void VPlanTransforms::addActiveLaneMask(
     HeaderMask->replaceAllUsesWith(LaneMask);
 }
 
+static VPRecipeBase *createEVLRecipe(VPValue &EVL, VPValue *HeaderMask,
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fhahn wrote:

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https://github.com/llvm/llvm-project/pull/119510