[BUG] Can not close last window

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

when switching from one session to another session, with terminal not in vim.o.sessionoptions, the toggleterm window can not be closed

### Expected Behavior

when switch from one session to another session, toggleterm window should be closed

### Steps To Reproduce

1. install dbsession plugin
2. save one session and with one toggleterminal
3. in another session, open toggleterm, the term is the first session's terminal

### Environment

```Markdown
- OS:ubuntu 18.04
- neovim version:0.9.0
- Shell:zsh
```

### Anything else?

_No response_