gui-e2e: xfail 'test_agent_connection_test'.

'Test agent connection' button is incorrectly visible.
CMK-29018 has been created as a bug.
CMK-29016

Change-Id: I1e87a7c8c3b1c5b6d28acc58ad830ff467129e34

Author: dhsh-checkmk

tests/gui_e2e/test_hosts.py

@@ -173,6 +173,7 @@ def test_delete_host_row(
     test_site.openapi.changes.activate_and_wait_for_completion(force_foreign_changes=True)
 
 
+@pytest.mark.xfail(strict=True, reason="CMK-29018")
 def test_agent_connection_test(dashboard_page: MainDashboard) -> None:
     """Validate agent connection test of a host."""
     add_host = AddHost(dashboard_page.page)