new feature: OpenDAL Python binding for Python 3.9

### Feature Description

I try to integrate opendal into lancedb but got:

```
Because the requested Python version (>=3.9) does not satisfy Python>=3.10 and opendal==0.46.0 depends on Python>=3.10, we can conclude that opendal==0.46.0 cannot
be used.
```

### Problem and Solution

It would be nice to be able to use it without forcing python 3.10. Would be curious if the community is willing to support it, or if we recommend upgrading the minimum python version of downstream projects.

### Additional Context

https://github.com/apache/opendal/blob/main/bindings/python/pyproject.toml#L31

### Are you willing to contribute to the development of this feature?

- [x] Yes, I am willing to contribute to the development of this feature.

Start with bindings/python/pyproject.toml at the Python requirement referenced in the issue. Check whether the binding can be packaged and used on Python 3.9 without changing downstream minimum-version expectations; done means the supported requirement is explicit and the Python 3.9 path is verified.

Written by the indexing model from the issue text.