[clang] [HLSL] Support packoffset attribute in AST (PR #89836)

[Chris B via cfe-commits]

================
@@ -4372,6 +4372,13 @@ def HLSLResourceBinding: InheritableAttr {
   let Documentation = [HLSLResourceBindingDocs];
 }
 
+def HLSLPackOffset: HLSLAnnotationAttr {
+  let Spellings = [HLSLAnnotation<"packoffset">];
+  let LangOpts = [HLSL];
+  let Args = [IntArgument<"Offset">];
----------------
llvm-beanz wrote:

I think it is fine to keep these as integers.

https://github.com/llvm/llvm-project/pull/89836