[clang-tools-extra] [clang-tidy] Add check 'bugprone-cast-to-struct' (PR #153428)

[Balázs Kéri via cfe-commits]

balazske wrote:

> > This new check does nearly the same thing
> 
> I feel a bit at unease reading this. Why can't we improve the existing check, instead of duplicating it?

The reason was that this check is not path-sensitive and these should be put into `clang-tidy`. Really the original check could be improved to handle dynamic types or type of memory region (but not the syntax-based check), then both may have valid use cases.

https://github.com/llvm/llvm-project/pull/153428