[remote][connection] Allow offline editing in Remote-WSL

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> After successfully opening a VSCode editor in Remote-WSL mode and then some time after, I lose network connectivity, I want the editor to remain usable. The current behavior brings up the `Disconnected. Attempting to reconnect` modal. After dismissing the modal, the modal returns almost immediately, making it impossible to continue editing. I want to be able to continue editing the file until network connectivity is restored. Only VSCode features [dependent on the network](https://code.visualstudio.com/docs/setup/network#_common-hostnames) should be disabled