Disable OIDC bypass URL

Due to security restrictions, some users might want to disable the bypass of the SSO from the URL. 

This should be a configuration for the extension when XWiki doesn't need to have any local account.

The bypass is mentioned on https://extensions.xwiki.org/xwiki/bin/view/Extension/OpenID%20Connect/OpenID%20Connect%20Authenticator/#HBypassOpenIDConnect