VSCode appears to still require GitHub signin despite recent update in 1.133.0 to remove this restriction

Does this issue occur when all extensions are disabled?: Yes

- VS Code Version: 1.133.0
- OS Version: macOS Sonoma 14.5.1

Steps to Reproduce:

1. Install VSCode on air gapped network with no external network access to the internet
2. Open "Agents" Window see pop up requesting GitHub authentication
3. Verify that the `@id:chat.agentHost.allowSignedOutWhenUsable` is checked marked (though there does not appear to be a way to access a `agentHost` setting under `chat` within `Settings`

See screen recording for verification:

https://github.com/user-attachments/assets/a85eb7b6-b929-49f6-88ee-3f8854cc47d6

Note: While I captured this screen recording with plugins enabled, after opening this bug report I did confirm the issue still persists when disabling all plugins

See documentation / release notes here describing this new feature:

https://code.visualstudio.com/updates/v1_133#_open-the-agents-window-without-github-sign-in-experimental

We configure and use local AI servers that are air gapped and Copilot works find when interfacing with the main "Chat" window within our air gapped network