fix(test): unskip test_smoke by switching to trtllm attention backend (DYN-2607) (#8104)

Signed-off-by: Yuewei Na <nv-yna@users.noreply.github.com>
Co-authored-by: Yuewei Na <nv-yna@users.noreply.github.com>

tests/basic/autodeploy_engine_config.yaml

@@ -6,4 +6,5 @@ kv_cache_config:
   enable_partial_reuse: false
   free_gpu_memory_fraction: 0.80
   max_tokens: 8192
-compile_backend: torch-cudagraph
+attn_backend: trtllm
+max_batch_size: 128

tests/basic/test_autodeploy_backend.py

@@ -166,7 +166,6 @@ def send_completion_request(
         raise
 
 
-@pytest.mark.skip(reason="Nightly CI failure: https://linear.app/nvidia/issue/DYN-2607")
 @pytest.mark.trtllm
 @pytest.mark.e2e
 @pytest.mark.slow