[Deprecation][2/N] Replace --task with --runner and --convert (#21470)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

examples/offline_inference/basic/classify.py

@@ -12,7 +12,9 @@ def parse_args():
     parser = EngineArgs.add_cli_args(parser)
     # Set example specific arguments
     parser.set_defaults(
-        model="jason9693/Qwen2.5-1.5B-apeach", task="classify", enforce_eager=True
+        model="jason9693/Qwen2.5-1.5B-apeach",
+        runner="pooling",
+        enforce_eager=True,
     )
     return parser.parse_args()
 
@@ -27,7 +29,7 @@ def main(args: Namespace):
     ]
 
     # Create an LLM.
-    # You should pass task="classify" for classification models
+    # You should pass runner="pooling" for classification models
     llm = LLM(**vars(args))
 
     # Generate logits. The output is a list of ClassificationRequestOutputs.