Transient failures to complete open_id auth shows a terminal error screen

### Steps to reproduce

1. Attempt to join a call.
2. Browser fails to complete the open_id auth dance because of some terminal error (e.g. spotty internet connection)

### Outcome

#### What did you expect?

Either an automatic or user directed retry function when a request fails.

#### What happened instead?

Which is a FailToGetOpenIdToken error being picked up as a configError by the view model due to throwing in getSFUConfigWithOpenID

### Operating system

--

### Browser information

--

### URL for webapp

call.element.io

### Will you send logs?

Yes