[clang] Allow for custom code model in clang::Interpreter (PR #156977)

[Vassil Vassilev via cfe-commits]

vgvassilev wrote:

> > Is there any reasonable way to test this?
> 
> Nothing great came to mind, for testing this in isolation.
> 
> One effect it could have is to solve issues like #102858, but that requires exposing this through a `clang-repl` flag and then tackling any other ASan-related issues. I didn't attempt that since it's quite the scope creep.

I can see that. It makes me a bit uncomfortable that this part will be left untested but c'est la vie...

https://github.com/llvm/llvm-project/pull/156977