[clang] [Clang] add wraps and no_wraps attributes (PR #115094)

[Justin Stitt via cfe-commits]

JustinStitt wrote:

@erichkeane 
> Also, did we have an RFC on this? I'd like to see what the community at large has to say.

Yes, here's the [RFC](https://discourse.llvm.org/t/rfc-add-wraps-attribute-for-granular-integer-overflow-handling/77670) and the [previous PR](https://github.com/llvm/llvm-project/pull/86618) (of which the scope has been expanded a bit so it deserves its own new PR, IMO)

https://github.com/llvm/llvm-project/pull/115094