[Cloud Security] Add failsOnMki to skip agentless agent policy test i…

…n quality gates (elastic#202238)

x-pack/test_serverless/functional/test_suites/security/ftr/cloud_security_posture/agentless_api/index.ts

@@ -9,7 +9,7 @@ import { FtrProviderContext } from '../../../../../ftr_provider_context';
 
 export default function ({ loadTestFile }: FtrProviderContext) {
   describe('cloud_security_posture', function () {
-    this.tags(['cloud_security_posture']);
+    this.tags(['failsOnMKI', 'cloud_security_posture']);
     loadTestFile(require.resolve('./create_agent'));
   });
 }