[Chore] Separate out system utilities from vllm.utils (#27201)

Signed-off-by: dongbo910220 <1275604947@qq.com>
Co-authored-by: Cyrus Leung <tlleungac@connect.ust.hk>

vllm/entrypoints/openai/api_server.py

@@ -108,13 +108,9 @@ from vllm.entrypoints.utils import (
 from vllm.logger import init_logger
 from vllm.reasoning import ReasoningParserManager
 from vllm.usage.usage_lib import UsageContext
-from vllm.utils import (
-    Device,
-    FlexibleArgumentParser,
-    decorate_logs,
-    set_ulimit,
-)
+from vllm.utils import Device, FlexibleArgumentParser, set_ulimit
 from vllm.utils.network_utils import is_valid_ipv6_address
+from vllm.utils.system_utils import decorate_logs
 from vllm.v1.engine.exceptions import EngineDeadError
 from vllm.v1.metrics.prometheus import get_prometheus_registry
 from vllm.version import __version__ as VLLM_VERSION