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

[Kevin Puetz via cfe-commits]

puetzk wrote:

Just for sake of linkdumping, https://developercommunity.visualstudio.com/t/Non-allocating-placement-array-new-somet/10777485?sort=active shows another (later) regression when the type in question come from a template parameter.

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