kubectl suggestion should also include aliases

**What would you like to be added**:
This is somewhat related to https://github.com/kubernetes/kubectl/issues/1740 issue, but this time it covers the suggestions.

I have a `runx` alias defined as follows:
```yaml
- name: runx
command: run
options:
- default: nginx
name: image
appendArgs:
- --
- custom-arg1
```

when trying to run, I've made a typo and tried to run `kubectl runc`:
```
$ kubectl runc
error: unknown command "runc" for "kubectl"

Did you mean this?
run
```

As presented above, the suggestion ONLY considered the built-in command, would it be possible to expand the suggestions with aliases?

/cc @ardaguclu @rxinui