[Bugfix][ROCm] running new process using spawn method for rocm in tests. (#14810)

Signed-off-by: vllmellm <vllm.ellm@embeddedllm.com>
Signed-off-by: tjtanaa <tunjian.tan@embeddedllm.com>
Co-authored-by: TJian <tunjian.tan@embeddedllm.com>
Co-authored-by: Cyrus Leung <cyrus.tl.leung@gmail.com>

tests/distributed/test_expert_parallel.py

@@ -8,7 +8,7 @@ import pytest
 from vllm.config import TaskOption
 from vllm.logger import init_logger
 
-from ..utils import compare_two_settings, fork_new_process_for_each_test
+from ..utils import compare_two_settings, create_new_process_for_each_test
 
 logger = init_logger("test_expert_parallel")
 
@@ -209,7 +209,7 @@ def _compare_tp(
         for params in settings.iter_params(model_name)
     ],
 )
-@fork_new_process_for_each_test
+@create_new_process_for_each_test()
 def test_ep(
     model_name: str,
     parallel_setup: ParallelSetup,