[llvm] [llvm-c][ocaml] Deprecate/replace constexpr GEP APIs (PR #228998)

[Ramkumar Ramachandra via llvm-commits]

================
@@ -355,6 +355,12 @@ module ModuleFlagBehavior = struct
   | AppendUnique
 end
 
+module GEPNoWrapFlags = struct
+  let inbounds = 1
+  let nusw = 2
+  let nuw = 4
+end
----------------
artagnon wrote:

```suggestion
module GEPNoWrapFlags = struct
  let none = 0
  let inbounds = 1
  let nusw = 2
  let nuw = 4
end
```

To avoid the special 0 value?

https://github.com/llvm/llvm-project/pull/228998