[clang] [clang][analyzer] Model more wide-character versions of string functions (PR #113908)

[Balazs Benics via cfe-commits]

https://github.com/steakhal commented:

Oh yes, I already reviewed this one.
I had only a few comments, otherwise it's good to me.
I'll get upstream folks involved on this one.

https://github.com/llvm/llvm-project/pull/113908