[Request]: Trigger local network privacy alert when runtime helper starts.

### Feature or enhancement request details

With port forwarding added for containers (#97), we're running traffic from host applications to containers through the loopback interface. For this to work, the user must approve local network access for `container-runtime-linux`. The approval is a one-time procedure for a given executable (it may be necessary to repeat the procedure after an upgrade).

At present, the alert appears, I believe, which traffic is sent to the proxy. This can lead to usability issues the first time because the client may fail anytime between the presentation of the alert and the user's approval.

The Apple technical note for local network privacy includes sample code for [preemptively triggering the alert](https://developer.apple.com/documentation/technotes/tn3179-understanding-local-network-privacy#Trigger-the-local-network-alert). `container-runtime-linux` should trigger the alert during container startup, so that the container networking is functional before the user offers traffic to the proxy.

### Code of Conduct

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