[clang] [analyzer] Fix FP for cplusplus.placement new #149240 (PR #150161)

[Balazs Benics via cfe-commits]

steakhal wrote:

This is really scary. Thanks for the really deep dive in the subject.
Frankly, any of the aformentioned ways are fine by me. Just removing (what is the current state of the PR) is probably the easiest. If you wish, we can overcomplicate this, but frankly, I don't want to support this sharp little edge case of msvc.
This would be a precedent for complicating support for msvc.

https://github.com/llvm/llvm-project/pull/150161