[Chore] Separate out vllm.utils.collections (#26990)

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

vllm/model_executor/layers/activation.py

@@ -17,7 +17,7 @@ from vllm.logger import init_logger
 from vllm.model_executor.custom_op import CustomOp
 from vllm.model_executor.utils import set_weight_attrs
 from vllm.platforms import current_platform
-from vllm.utils import LazyDict
+from vllm.utils.collections import LazyDict
 
 logger = init_logger(__name__)