Adds method to read the pooling types from model's files (#9506)

Signed-off-by: Flavia Beo <flavia.beo@ibm.com>
Signed-off-by: Max de Bayser <mbayser@br.ibm.com>
Co-authored-by: Max de Bayser <mbayser@br.ibm.com>

tests/engine/test_arg_utils.py

@@ -30,6 +30,13 @@ def test_limit_mm_per_prompt_parser(arg, expected):
     assert args.limit_mm_per_prompt == expected
 
 
+def test_valid_pooling_config():
+    parser = EngineArgs.add_cli_args(FlexibleArgumentParser())
+    args = parser.parse_args(["--pooling-type=MEAN"])
+    engine_args = EngineArgs.from_cli_args(args=args)
+    assert engine_args.pooling_type == 'MEAN'
+
+
 @pytest.mark.parametrize(
     ("arg"),
     [