[ROCm][CI] Fix test_cudagraph_mode.py Failure For AMD CI (#29808)

Signed-off-by: Micah Williamson <micah.williamson@amd.com>

tests/v1/cudagraph/test_cudagraph_mode.py

@@ -100,32 +100,20 @@ def test_backend_and_cudagraph_mode_combo(backend_name, cudagraph_mode, supporte
 
 # test cudagraph_mode with different compilation mode.
 # (backend_name, cudagraph_mode, compilation_mode, supported)
-if current_platform.is_rocm():
-    combo_cases_2 = [
-        ("RocmAttn", "FULL", CompilationMode.NONE, True),
-        ("RocmAttn", "FULL", CompilationMode.VLLM_COMPILE, True),
-        ("RocmAttn", "PIECEWISE", CompilationMode.NONE, False),
-        ("RocmAttn", "PIECEWISE", CompilationMode.VLLM_COMPILE, True),
-        ("RocmAttn", "FULL_AND_PIECEWISE", CompilationMode.NONE, False),
-        ("RocmAttn", "FULL_AND_PIECEWISE", CompilationMode.VLLM_COMPILE, True),
-        ("RocmAttn", "FULL_DECODE_ONLY", CompilationMode.NONE, True),
-        ("RocmAttn", "FULL_DECODE_ONLY", CompilationMode.VLLM_COMPILE, True),
-        ("RocmAttn", "NONE", CompilationMode.NONE, True),
-        ("RocmAttn", "NONE", CompilationMode.VLLM_COMPILE, True),
-    ]
-else:
-    combo_cases_2 = [
-        ("FA2", "FULL", CompilationMode.NONE, True),
-        ("FA2", "FULL", CompilationMode.VLLM_COMPILE, True),
-        ("FA2", "PIECEWISE", CompilationMode.NONE, True),
-        ("FA2", "PIECEWISE", CompilationMode.VLLM_COMPILE, True),
-        ("FA2", "FULL_AND_PIECEWISE", CompilationMode.NONE, True),
-        ("FA2", "FULL_AND_PIECEWISE", CompilationMode.VLLM_COMPILE, True),
-        ("FA2", "FULL_DECODE_ONLY", CompilationMode.NONE, True),
-        ("FA2", "FULL_DECODE_ONLY", CompilationMode.VLLM_COMPILE, True),
-        ("FA2", "NONE", CompilationMode.NONE, True),
-        ("FA2", "NONE", CompilationMode.VLLM_COMPILE, True),
-    ]
+attn_backend = "RocmAttn" if current_platform.is_rocm() else "FA2"
+
+combo_cases_2 = [
+    (attn_backend, "FULL", CompilationMode.NONE, True),
+    (attn_backend, "FULL", CompilationMode.VLLM_COMPILE, True),
+    (attn_backend, "PIECEWISE", CompilationMode.NONE, True),
+    (attn_backend, "PIECEWISE", CompilationMode.VLLM_COMPILE, True),
+    (attn_backend, "FULL_AND_PIECEWISE", CompilationMode.NONE, True),
+    (attn_backend, "FULL_AND_PIECEWISE", CompilationMode.VLLM_COMPILE, True),
+    (attn_backend, "FULL_DECODE_ONLY", CompilationMode.NONE, True),
+    (attn_backend, "FULL_DECODE_ONLY", CompilationMode.VLLM_COMPILE, True),
+    (attn_backend, "NONE", CompilationMode.NONE, True),
+    (attn_backend, "NONE", CompilationMode.VLLM_COMPILE, True),
+]
 
 
 @pytest.mark.parametrize(