[Inductor][Triton] Fix test_autotune_inplace_kernel to work with newer Triton version (pytorch#148595)

For new Triton version 3.3, constexpr are included as part of the signature. Update failing test to reflect this change, additional context in pytorch#145051.

Pull Request resolved: pytorch#148595
Approved by: https://github.com/davidberard98

Author: PaulZhang12

test/inductor/test_cuda_repro.py

@@ -551,9 +551,15 @@ def test_autotune_inplace_kernel(self):
         from torch._C import _cuda_getCurrentRawStream as get_cuda_stream
         from torch._inductor.runtime.hints import AttrsDescriptorWrapper, HeuristicType
         from torch._inductor.runtime.triton_heuristics import CachingAutotuner, grid
+        from torch._inductor.utils import triton_version_uses_attrs_dict
 
         def autotune(configs, meta):
             def decorator(fn):
+                if triton_version_uses_attrs_dict():
+                    # Newer versions of Triton puts constexpr in signature
+                    # Ref: https://github.com/pytorch/pytorch/pull/145051
+                    meta["signature"]["XBLOCK"] = "constexpr"
+
                 return CachingAutotuner(
                     # force autotune by setting save_cache_hook to False
                     fn,