Attach overlaybd device will fail if the mountpoint contains a symbol link

### What happened in your environment?

ubuntu/centos

### What did you expect to happen?

_No response_

### How can we reproduce it?

create a symbol link for snapshotter's root
it will cause a failure when attaching a device

```go
func lookup(dir string) error {
dir = filepath.Clean(dir)

m, err := mountinfo.GetMounts(mountinfo.SingleEntryFilter(dir))
if err != nil {
return errors.Wrapf(err, "failed to get mount info for %q", dir)
}

if len(m) == 0 {
return errors.Errorf("failed to find the mount point for %q", dir)
}
return nil
}
```

mountinfo.GetMounts can not find the matched mountpoint if the 'dir' contains a symbol link in its path

### What is the version of your Accelerated Container Image?

latest

### What is your OS environment?

ubuntu 22.04

### Are you willing to submit PRs to fix it?

- [X] Yes, I am willing to fix it.