As requested in https://github.com/gazebosim/gz-transport/pull/723#pullrequestreview-3281821141, apply the `GZ_IP=127.0.0.1` configuration from https://github.com/gazebosim/gz-transport/pull/595 and https://github.com/gazebosim/gz-transport/pull/723 to all tests using gz-transport. - [ ] gz-gui - [ ] gz-launch - [ ] gz-sensors - [ ] gz-sim