[https://nvbugs/6206179][test] Waive failing TestQwen3_5_35B_A3B::test_bf16_mtp[mtp_on]

The test crashes during autotuner warmup with
'NoneType' object has no attribute 'gather_ids' at
modeling_speculative.py:1748 when MTP eagle one-model is combined
with Qwen3.5-35B-A3B. Pre-existing regression on main introduced by
the Qwen3.5 VL MoE landing (96a4a09); unrelated to this PR's
changes. Tracked in https://nvbugs/6206179.

Signed-off-by: Brian Nguyen <brnguyen@nvidia.com>

Author: brnguyen2

tests/integration/test_lists/waives.txt

@@ -86,6 +86,7 @@ accuracy/test_llm_api_pytorch.py::TestQwen3_235B_A22B::test_fp8[throughput_laten
 accuracy/test_llm_api_pytorch.py::TestQwen3_30B_A3B_Instruct_2507::test_skip_softmax_attention_4gpus[target_sparsity_0.5-fp8kv=False] SKIP (https://nvbugs/6260915)
 accuracy/test_llm_api_pytorch.py::TestQwen3_30B_A3B_Instruct_2507::test_skip_softmax_attention_4gpus[target_sparsity_0.5-fp8kv=True] SKIP (https://nvbugs/6248783)
 accuracy/test_llm_api_pytorch.py::TestQwen3_30B_A3B_Instruct_2507::test_skip_softmax_attention_4gpus[target_sparsity_0.9-fp8kv=False] SKIP (https://nvbugs/6260915)
+accuracy/test_llm_api_pytorch.py::TestQwen3_5_35B_A3B::test_bf16_mtp[mtp_on] SKIP (https://nvbugs/6206179)
 accuracy/test_llm_api_pytorch.py::TestQwen3_5_397B_A17B::test_nvfp4[tep4_cutedsl] SKIP (https://nvbugs/6255417)
 accuracy/test_llm_api_pytorch.py::TestQwen3_5_4B::test_bf16 SKIP (https://nvbugs/6283537)
 accuracy/test_llm_api_pytorch.py::TestQwen3_5_9B::test_bf16[mtp_off] SKIP (https://nvbugs/6212250)