skip flaky suite (#64696)

(cherry picked from commit 55da30d)

Author: spalger

x-pack/test/api_integration/apis/fleet/unenroll_agent.ts

@@ -16,7 +16,8 @@ export default function (providerContext: FtrProviderContext) {
   const supertest = getService('supertest');
   const esClient = getService('es');
 
-  describe('fleet_unenroll_agent', () => {
+  // FLAKY: https://github.com/elastic/kibana/issues/64696
+  describe.skip('fleet_unenroll_agent', () => {
     let accessAPIKeyId: string;
     let outputAPIKeyId: string;
     before(async () => {