"az container start" should provide "--attach" as an optional parameter

**Is your feature request related to a problem? No**

**Describe the solution you'd like**
Be able to attach local standard input, output, and error streams to a starting container.

```sh
az container start --attach [...]
```

**Describe alternatives you've considered**
For now we are using these following command lines

```sh
az container start [...]
az container attach[...]
```
**Additional context**
This parameter is already available in Docker CLI : [docker start](https://docs.docker.com/engine/reference/commandline/start/)