[https://nvbugs/5747938][infra] Unwaive trtllm serve example test (#10820)

Signed-off-by: Pengyun Lin <81065165+LinPoly@users.noreply.github.com>

Author: LinPoly

tests/integration/test_lists/waives.txt

@@ -267,7 +267,6 @@ accuracy/test_llm_api_pytorch.py::TestLlama3_1_8BInstruct::test_fp8_4gpus[pp4-fp
 accuracy/test_llm_api_pytorch.py::TestQwen3_30B_A3B::test_nvfp4[dep4_latency_moe_cutlass-torch_compile=False] SKIP (https://nvbugs/5740377)
 test_e2e.py::test_trtllm_bench_llmapi_launch[pytorch_backend-llama-v3-llama3-8b] SKIP (https://nvbugs/5744432)
 test_e2e.py::test_trtllm_serve_multimodal_example SKIP (https://nvbugs/5747920)
-test_e2e.py::test_trtllm_serve_example SKIP (https://nvbugs/5747938)
 triton_server/test_triton.py::test_opt[opt] SKIP (https://nvbugs/5739981)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_nvfp4_4gpus_online_eplb[fp8kv=True-moe_backend=TRTLLM] SKIP (https://nvbugs/5740377)
 cpp/test_multi_gpu.py::TestDisagg::test_symmetric_executor[gpt-2proc-mpi_kvcache-90] SKIP (https://nvbugs/5755941)