[llvm] [VPlan] Move recording of Inst->VPValue to VPRecipeBuilder (NFCI). (PR #84464)

[via llvm-commits]

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@@ -2985,33 +2977,30 @@ class VPlan {
   void setName(const Twine &newName) { Name = newName.str(); }
 
   void addVPValue(Value *V, VPValue *VPV) {
-    assert((Value2VPValueEnabled || VPV->isLiveIn()) &&
-           "Value2VPValue mapping may be out of date!");
-    assert(V && "Trying to add a null Value to VPlan");
-    assert(!Value2VPValue.count(V) && "Value already exists in VPlan");
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ayalz wrote:

Worth retaining these asserts?

https://github.com/llvm/llvm-project/pull/84464