Pilot in charts

In the future, would it be nice to have a pilot in charts?

Something like this:

```bash
./diracx-charts/run-demo.sh diracx pilot

# [... Run demo starts]
```

And when diracx is started, in another terminal we could be able to launch our pilot version:

```bash
kubectl exec -it deployment/a-pilot-container -- start-pilot.sh
```

This would help developing new features in DiracX and in the pilot while testing it in real life conditions.

> For this purpose, I currently use [this repo (Dirac Pilot Local Launcher)](https://github.com/Robin-Van-de-Merghel/Dirac-Pilot-Local-Launcher) to launch my pilot with DiracX. I think including it in DiracX (as a flag?) could be useful.