[clang] [clang][bytecode] Handle negative array sizes in constexpr `new` instead of asserting (PR #155737)

[Timm Baeder via cfe-commits]

================
@@ -3490,7 +3490,15 @@ inline bool AllocN(InterpState &S, CodePtr OpPC, PrimType T, const Expr *Source,
     S.Stk.push<Pointer>(0, nullptr);
     return true;
   }
-  assert(NumElements.isPositive());
+  if (!NumElements.isPositive()) {
----------------
tbaederr wrote:

```suggestion
  if (NumElements.isNegative()) {
```

https://github.com/llvm/llvm-project/pull/155737