bug: Python binding not working for the ftp protocol

### Describe the bug

I tried to connect to an ftp server using apache opendal version `0.45.10` but it seems that the FTP scheme still not supported in the python binding

### Steps to Reproduce

I tried to connect to the server using the Operator from Opendal:

```
from opendal import Operator
op = Operator(scheme="ftp", endpoint="...", user="...", password="..")
```
I got this error:

```
---------------------------------------------------------------------------
UnsupportedError Traceback (most recent call last)
----> [1]( op = Operator(scheme="ftp", endpoint=".....", user="....", password="....")

UnsupportedError: Unsupported (permanent) at , context: { scheme: ftp } => scheme is not enabled or supported
```

### Expected Behavior

Should connect successfully to an FTP server

### Additional Context

_No response_

### Are you willing to submit a PR to fix this bug?

- [ ] Yes, I would like to submit a PR.

Start by reproducing the failure with the Python `Operator` entry point using `scheme="ftp"`, then trace how supported schemes are exposed to the Python binding. Done means the same construction succeeds and can connect to an FTP server; add or update coverage if the repository has a relevant binding test.

Written by the indexing model from the issue text.