Fix misleading auth-token error message in case "sentry-cli info" fails

[markushi]

📜 Description

Telemetry uses sentry-cli info to gather some env setup information. However, if no auth token is present the stderr is printed and shown as an error in IDEs like Android Studio.

As it can be fine for sentry-cli info to fail, simply swallow and re-print the std err and fallback to a default config.

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[romtsn]

LGTM, not sure if we need a test for this, but it's also fine without