Set KUBE_INGRESS_BASE_DOMAIN for Auto DevOps QA test

See https://gitlab.com/gitlab-org/gitlab/-/issues/351530

qa/qa/specs/features/browser_ui/7_configure/auto_devops/create_project_with_auto_devops_spec.rb

@@ -10,6 +10,7 @@ module QA
     end
 
     before do
+      set_kube_ingress_base_domain(project)
       disable_optional_jobs(project)
     end
 
@@ -73,6 +74,15 @@ module QA
 
     private
 
+    def set_kube_ingress_base_domain(project)
+      Resource::CiVariable.fabricate_via_api! do |resource|
+        resource.project = project
+        resource.key = 'KUBE_INGRESS_BASE_DOMAIN'
+        resource.value = 'example.com'
+        resource.masked = false
+      end
+    end
+
     def disable_optional_jobs(project)
       %w[
         CODE_QUALITY_DISABLED LICENSE_MANAGEMENT_DISABLED