This time for `SocketException`s. I seem to recall looking at this and
deciding there was a reason to not catch socket exceptions, but on
revisiting it seems sane to do so.
This covers a fail case like reported:
```
2023-10-06 03:24:17 [verbose]: Request to https://lazer.ppy.sh/oauth/token failed with System.Net.Http.HttpRequestException: No such host is known. (lazer.ppy.sh:443)
2023-10-06 03:24:17 [verbose]: ---> System.Net.Sockets.SocketException (11001): No such host is known.
2023-10-06 03:24:17 [verbose]: at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
```
Closes https://github.com/ppy/osu/issues/24890 (again).