ipa-advise: Define the domain used when looking up ipa-ca

The error message if ipa-ca can't be resolved included the
undefined variable ${domain_name}. Since this is static anyway
change to a python format string and hardcode the string in
the resulting script as api.env.domain.

Discovered while working on https://pagure.io/freeipa/issue/8934

Related: https://pagure.io/freeipa/issue/8934

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

ipaserver/advise/plugins/smart_card_auth.py

@@ -149,7 +149,7 @@ class config_server_for_smart_card_auth(common_smart_card_auth_config):
         self.log.exit_on_predicate(
             '[ -z "$ipaca_records" ]',
             [
-                'Can not resolve ipa-ca records for ${domain_name}',
+                f'Can not resolve ipa-ca records for {ipa_domain_name}',
                 'Please make sure to update your DNS infrastructure with ',
                 'ipa-ca record pointing to IP addresses of IPA CA masters'
             ])