[clang] [clang][repl] fix `new` on Mac M1 (PR #69072)

[Vassil Vassilev via cfe-commits]

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@@ -248,7 +248,7 @@ Interpreter::~Interpreter() {
 // can't find the precise resource directory in unittests so we have to hard
 // code them.
 const char *const Runtimes = R"(
-    void* operator new(__SIZE_TYPE__, void* __p) noexcept;
+    #include <new>
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vgvassilev wrote:

```suggestion
```

I'd prefer to drop it for now. We cannot really re-declare the operator new with placement in a platform independent way. We cannot really rely on including `<new>` because it won't work across our build bots.

https://github.com/llvm/llvm-project/pull/69072