[Auth] Choose which auth storage to use based on config (#5792)

This PR is a follow-up to #5591. It allows users to choose which auth
storage mode they want by using the new
`cli_auth_credentials_store_mode` config.

codex-rs/login/src/device_code_auth.rs

@@ -199,6 +199,7 @@ pub async fn run_device_code_login(opts: ServerOptions) -> std::io::Result<()> {
         tokens.id_token,
         tokens.access_token,
         tokens.refresh_token,
+        opts.cli_auth_credentials_store_mode,
     )
     .await
 }