[None][infra] Waive 1 failed cases for main in pre-merge 48139 (NVIDIA#16519)

Signed-off-by: trtllm-agent <296075020+trtllm-agent@users.noreply.github.com>

Author: trtllm-agent

tests/integration/test_lists/waives.txt

@@ -245,6 +245,7 @@ full:B300/accuracy/test_llm_api_pytorch_multimodal.py::TestExaone4_5_33B::test_a
 full:B300/accuracy/test_llm_api_pytorch_multimodal.py::TestQwen2_5_VL_7B::test_auto_dtype SKIP (https://nvbugs/6316983)
 full:B300/disaggregated/test_disaggregated.py::test_disaggregated_ctxpp2_genpp2[TinyLlama-1.1B-Chat-v1.0] SKIP (https://nvbugs/6322073)
 full:B300/test_e2e.py::test_qwen_e2e_cpprunner_large_new_tokens[DeepSeek-R1-Distill-Qwen-1.5B-DeepSeek-R1-Distill-Qwen-1.5B] SKIP (https://nvbugs/6414760)
+full:B300/unittest/_torch/attention/test_attention_backends.py::test_attention_backend[gpt_oss_gqa_hd64_gptj_swa128-ctx-bf16-HND-p32-v1] SKIP (https://nvbugs/6468821)
 full:DGX_B300/accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[ep4-mtp_nextn=2-attention_dp=True-cuda_graph=True-overlap_scheduler=True-torch_compile=False] SKIP (https://nvbugs/6432831)
 full:GB200/accuracy/test_disaggregated_serving.py::TestLlama3_1_8BInstruct::test_eagle3[eagle3_one_model=False-overlap_scheduler=False] SKIP (https://nvbugs/6402500)
 full:GB200/accuracy/test_disaggregated_serving.py::TestLlama3_1_8BInstruct::test_guided_decoding_with_eagle3[llguidance-eagle3_one_model=False] SKIP (https://nvbugs/6402500)