[Hardware] Replace torch.cuda.empty_cache with torch.accelerator.empty_cache (#30681)

Signed-off-by: Kunshang Ji <kunshang.ji@intel.com>
Signed-off-by: Kunshang Ji <jikunshang95@gmail.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

benchmarks/kernels/benchmark_moe.py

@@ -54,7 +54,7 @@ def clear_triton_cache():
 
     # Clear CUDA memory cache
     if torch.cuda.is_available():
-        torch.cuda.empty_cache()
+        torch.accelerator.empty_cache()
 
     # Try to clear Triton's runtime cache
     try: