[None][chore] Add failed cases into waives.txt (NVIDIA#9156)

Signed-off-by: xinhe-nv <200704525+xinhe-nv@users.noreply.github.com>

Author: xinhe-nv

tests/integration/test_lists/waives.txt

@@ -412,3 +412,5 @@ disaggregated/test_auto_scaling.py::test_worker_restart[http-load_balancing] SKI
 disaggregated/test_auto_scaling.py::test_worker_restart[http-round_robin] SKIP (https://nvbugs/5649010)
 disaggregated/test_disaggregated.py::test_disaggregated_mixed[TinyLlama-1.1B-Chat-v1.0] SKIP (https://nvbugs/5661926)
 unittest/_torch/sampler/test_torch_sampler.py::TestBatchedSampling SKIP (https://nvbugs/5661877)
+test_e2e.py::test_ptp_quickstart_multimodal[mistral-small-3.1-24b-instruct-Mistral-Small-3.1-24B-Instruct-2503-mixture_text_image-True] SKIP (https://nvbugs/5568836)
+test_e2e.py::test_trtllm_multimodal_benchmark_serving SKIP (https://nvbugs/5647825)