[Inductor] Support Triton AttrsDescriptor cls field (pytorch#139193)

Fixes pytorch#139179

Adding corresponding changes to triton-lang/triton#4888

Pull Request resolved: pytorch#139193
Approved by: https://github.com/bertmaher

Author: alexbaden

torch/_inductor/runtime/hints.py

@@ -52,7 +52,9 @@ def AttrsDescriptorWrapper(
             }
 
             # Instantiate AttrsDescriptor with the prepared arguments
-            res = AttrsDescriptor.from_dict(kwargs)
+            res = AttrsDescriptor.from_dict(
+                {"arg_properties": kwargs, "cls": AttrsDescriptor.__name__}
+            )
             assert res.property_values["tt.divisibility"] == 16
             assert res.property_values["tt.equal_to"] == 1
             return res