[CI] disable test_engine_client.py unit test (#5272)

Author: EmmonsCurse

tests/cov_pytest.ini

@@ -6,3 +6,4 @@ addopts =
     --ignore=tests/operators/test_fused_moe.py
     --ignore=tests/operators/test_w4afp8_gemm.py
     --ignore=tests/model_loader/test_w4a8_model.py
+    --ignore=tests/entrypoints/test_engine_client.py