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

[Mel Chen via llvm-commits]

================
@@ -1438,13 +1438,98 @@ void VPlanTransforms::addActiveLaneMask(
     HeaderMask->replaceAllUsesWith(LaneMask);
 }
 
+/// Create EVLRecipe with Recipe
----------------
Mel-Chen wrote:

The comment needs to be more detailed. 
Due to the numerous arguments, it might be helpful to use \p in the comment to reference arguments for further explanation. The comments for `getPredicatedMask` and `mergeReplicateRegionsIntoSuccessors` in the same file serve as great references.

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