Update Runner Config Documentation for PAT

[nerddtvg]

The Runner config.sh/cmd documentation states that --pat is only used for network testing, however the code to get registration and remove tokens also supports the --pat in place of --token. Can the documentation and help text be updated to show that?

https://github.com/actions/runner/blob/main/src/Runner.Listener/Configuration/ConfigurationManager.cs#L643-L668

This should be repo, org, or enterprise scope:

https://github.com/actions/runner/blob/main/src/Runner.Listener/Runner.cs#L738