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

[Marco Elver via cfe-commits]

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+// RUN: %clang_cc1 %s -verify -fsyntax-only -triple x86_64-pc-linux-gnu
+typedef int __attribute__((wraps)) wrapping_int;
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melver wrote:

Can we test more types?

Can the attributes be applied to pointers? Both the pointer itself and the pointee? It's worth adding tests, just to ensure nothing regresses here.

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