Peer-to-peer call tests in Discuss now automatically skip when no network is available. This avoids false test failures in environments where WebRTC cannot generate the required connection data, helping keep release checks more reliable.

This commit adds a skip to peerToPeer tests for when there is no
network as the webRTC API needs to have at least a local network
to generate ICE candidates.

Forward-Port-Of: odoo/odoo#219587