new feature: OpenDAL Python binding for Python 3.9

[jackye1995]

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.

[tisonkun]

We typically don't lock opendal to an early version.

See https://endoflife.date/python where Python's current active support versions are 3.13 and 3.14. Security support goes back to 3.10.

What if another user asks for support for 3.4, or even Python 2? I'd generally suggest you to upgrade your toolchain instead.

That said, @Zheaoli and @messense may provide other context here if supporting 3.9 does no harm and can be easily implemented.