[Bugfix] Replace `PoolingParams.normalize` with `use_activation` (#32243)

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

vllm/transformers_utils/config.py

@@ -801,7 +801,7 @@ def get_pooling_config(
 
         logger.info("Found pooling configuration.")
 
-        config: dict[str, Any] = {"normalize": normalize}
+        config: dict[str, Any] = {"use_activation": normalize}
         for key, val in pooling_dict.items():
             if val is True:
                 pooling_type = parse_pooling_type(key)