allow to set --enforce-eager

vllm/engine/arg_utils.py

@@ -564,7 +564,7 @@ class EngineArgs:
                             'This should be a JSON string that will be '
                             'parsed into a dictionary.')
         parser.add_argument('--enforce-eager',
-                            # action='store_true',
+                            action='store_true',
                             default=True,
                             help='Always use eager-mode PyTorch. If False, '
                             'will use eager mode and CUDA graph in hybrid '