[Chore] Separate out vllm.utils.importlib (#27022)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

vllm/attention/selector.py

@@ -13,7 +13,8 @@ import vllm.envs as envs
 from vllm.attention.backends.abstract import AttentionBackend
 from vllm.attention.backends.registry import _Backend, backend_name_to_enum
 from vllm.logger import init_logger
-from vllm.utils import STR_BACKEND_ENV_VAR, resolve_obj_by_qualname
+from vllm.utils import STR_BACKEND_ENV_VAR
+from vllm.utils.import_utils import resolve_obj_by_qualname
 
 logger = init_logger(__name__)