[Log] Optimize startup log (#28948)

Signed-off-by: yewentao256 <zhyanwentao@126.com>
Signed-off-by: Wentao Ye <44945378+yewentao256@users.noreply.github.com>
Co-authored-by: Nick Hill <nhill@redhat.com>

vllm/model_executor/layers/fused_moe/fused_moe.py

@@ -872,8 +872,10 @@ def get_moe_configs(
     for config_file_path in config_file_paths:
         if os.path.exists(config_file_path):
             with open(config_file_path) as f:
-                logger.info(
-                    "Using configuration from %s for MoE layer.", config_file_path
+                logger.info_once(
+                    "Using configuration from %s for MoE layer.",
+                    config_file_path,
+                    scope="global",
                 )
                 # If a configuration has been found, return it
                 tuned_config = json.load(f)