[clang-tools-extra] Fixed a false positive for pointer parameters used as placement-new storage (PR #207770)

[Yanzuo Liu via cfe-commits]

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@@ -433,3 +433,22 @@ void dependentInitInGenericLambdaMultiArg() {
     DependentCtor2<T> s(p, p);
   };
 }
+
+namespace std { typedef decltype(sizeof(int)) size_t; }
+void* operator new(std::size_t, void*) noexcept;
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zwuis wrote:

Create a mock header in `clang-tools-extra/test/clang-tidy/checkers/Inputs/Headers/std`, add this to the header, then `#include <new>`.

https://github.com/llvm/llvm-project/pull/207770