[diffusion] refactor: deprecate workloadtype (#15267)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

python/sglang/multimodal_gen/test/server/test_server_utils.py

@@ -22,7 +22,10 @@ from openai import Client, OpenAI
 
 from sglang.multimodal_gen.benchmarks.compare_perf import calculate_upper_bound
 from sglang.multimodal_gen.runtime.utils.common import is_hip, kill_process_tree
-from sglang.multimodal_gen.runtime.utils.logging_utils import init_logger
+from sglang.multimodal_gen.runtime.utils.logging_utils import (
+    global_suppress_loggers,
+    init_logger,
+)
 from sglang.multimodal_gen.runtime.utils.perf_logger import RequestPerfRecord
 from sglang.multimodal_gen.test.server.testcase_configs import (
     DiffusionSamplingParams,
@@ -40,6 +43,8 @@ from sglang.multimodal_gen.test.test_utils import (
 
 logger = init_logger(__name__)
 
+global_suppress_loggers()
+
 
 def download_image_from_url(url: str) -> Path:
     """Download an image from a URL to a temporary file.