Zhihan Fang db5970c1a6 [coreml-backend-tool] fix pytorch-backended issue on new coremltools (#155543) ...

Summary:
the new coreml tool is export mlpakage instead mlmodel in default option.  when we use new 8.0 coreml tool to convert to backend, the error is

```
Exception: MLModel of type mlProgram cannot be loaded just from the model spec object. It also needs the path to the weights file. Please provide that as well, using the 'weights_dir' argument.
```

Test Plan:
tested with internal workflow

Rollback Plan:

Differential Revision: D76325462

Pull Request resolved: https://github.com/pytorch/pytorch/pull/155543
Approved by: https://github.com/shoumikhin

2025-06-11 20:52:26 +00:00

..

__init__.py

…

preprocess.py

[coreml-backend-tool] fix pytorch-backended issue on new coremltools (#155543)

2025-06-11 20:52:26 +00:00