OAuth2 issuer names are not processed through Moodle filters

OAuth2 issuer names do not support multi-language because they are not processed through Moodle filters. While this is may be fine for brand name providers providers like Facebook, LinkedIn and Google, it does not work for organizational names like "The cookie factory" and creates accessibility issues on the login page or or block for users who cannot read the language in which the OAuth2 service buttons are displayed.