Show error when API Fuzzing feature not available

changelogs/unreleased/270412-license-error-in-template.yml

+---
+title: Show error in pipeline when API Fuzzing not licensed
+merge_request: 46064
+author:
+type: changed

ee/spec/lib/gitlab/ci/templates/api_fuzzing_gitlab_ci_yaml_spec.rb

@@ -47,8 +47,8 @@ RSpec.describe 'API-Fuzzing.gitlab-ci.yml' do
         create(:ci_variable, project: project, key: 'FUZZAPI_TARGET_URL', value: 'http://example.com')
       end
 
-      it 'includes no jobs' do
-        expect { pipeline }.to raise_error(Ci::CreatePipelineService::CreateError)
+      it 'includes job to display error' do
+        expect(build_names).to match_array(%w[apifuzzer_fuzz_unlicensed])
       end
     end
 

lib/gitlab/ci/templates/Security/API-Fuzzing.gitlab-ci.yml

@@ -26,6 +26,17 @@ variables:
     FUZZAPI_IMAGE: registry.gitlab.com/gitlab-org/security-products/analyzers/api-fuzzing:${FUZZAPI_VERSION}-engine
     #
 
+apifuzzer_fuzz_unlicensed:
+    stage: fuzz
+    allow_failure: true
+    rules:
+        - if: '$GITLAB_FEATURES !~ /\bapi_fuzzing\b/ && $API_FUZZING_DISABLED == null'
+        - when: never
+    script:
+        - |
+            echo "Error: Your GitLab project is not licensed for API Fuzzing."
+        - exit 1
+
 apifuzzer_fuzz:
     stage: fuzz
     image: