Skip katello-ca-consumer RPM upgrade test for foremanctl installs (#22172)

Skip katello-ca-consumer RPM upgrade test for foremanctl

The katello-ca-consumer RPM is no longer hosted on foremanctl installations.
This test downloads and rebuilds the RPM, so it would fail on foremanctl.
Restrict test to satellite-installer deployments only.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: jeremylenz

tests/foreman/cli/test_registration.py

@@ -109,6 +109,7 @@ def test_host_registration_end_to_end(
     assert rhel_contenthost.subscription_config['server']['port'] == CLIENT_PORT
 
 
+@pytest.mark.foreman_installer
 @pytest.mark.rhel_ver_list([settings.content_host.default_rhel_version])
 def test_upgrade_katello_ca_consumer_rpm(module_org, module_location, target_sat, rhel_contenthost):
     """After updating the consumer cert the rhsm.conf file still points to Satellite host name