[Benchmark] Add cross_entropy to tritonbench integration

stack-info: PR: #321, branch: yf225/stack/29

Author: yf225

benchmarks/run.py

@@ -73,6 +73,11 @@
         "examples.fp8_attention",
         "fp8_attention_tritonbench",
     ),
+    "cross_entropy": (
+        "tritonbench.operators.cross_entropy.operator",
+        "examples.cross_entropy",
+        "cross_entropy",
+    ),
 }