New Feature Flags Defend Advanced Policy Option for 8.13.0 (elastic#1…

…77044)

## Summary

Adds support for upcoming optional feature flags.

### Checklist

Delete any items that are not applicable to this PR.

- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

Co-authored-by: Kibana Machine <[email protected]>

x-pack/plugins/security_solution/public/management/pages/policy/models/advanced_policy_schema.ts

@@ -1589,4 +1589,15 @@ export const AdvancedPolicySchema: AdvancedPolicySchemaType[] = [
       }
     ),
   },
+  {
+    key: 'windows.advanced.flags',
+    first_supported_version: '8.13.0',
+    documentation: i18n.translate(
+      'xpack.securitySolution.endpoint.policy.advanced.windows.advanced.flags',
+      {
+        defaultMessage:
+          'A comma-separated list of feature flags. Currently no feature flags are supported.',
+      }
+    ),
+  },
 ];