As we are rolling out the user profile feature, we'd like to expand the [Usage API](https://www.elastic.co/guide/en/elasticsearch/reference/current/usage-api.html) to report usage stats of user profiles such as (1) number of enabled user profiles and (2) number of user profiles that are [activated](https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-activate-user-profile.html) over the past X days. 

Response of the Usage API already contains a `security` field that groups relevant stats from security related features. We expect the new stats for user profiles should be added under it as well, for example:
```
{
  "security: {
    "user_profile": {
      "activated": 78,
      "recently_activated": 42  <1>
    }
  }
}
```
<1> The use of `recently_` is chosen to avoid the field to be tied to a specific time period so it is easier to evolve the definition in future.

x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/Security.java
* overwrite the query cache implementation to prevent data leakage to unauthorized users.
                 */
                module.forceQueryCacheProvider(
                    (indexSettings, cache) -> new OptOutQueryCache(indexSettings.getIndex(), cache, threadContext.get())
                );
            }
            
            
            
            module.addSearchOperationListener(new SecuritySearchOperationListener(securityContext.get(), auditTrailService.get()));
        }
    }
    @Override
    public List<ActionHandler<? extends ActionRequest, ? extends ActionResponse>> getActions() {
        var usageAction = new ActionHandler<>(XPackUsageFeatureAction.SECURITY, SecurityUsageTransportAction.class);
        var infoAction = new ActionHandler<>(XPackInfoFeatureAction.SECURITY, SecurityInfoTransportAction.class);
        if (enabled == false) {
            return Arrays.asList(usageAction, infoAction);
        }
        return Arrays.asList(
            new ActionHandler<>(ClearRealmCacheAction.INSTANCE, TransportClearRealmCacheAction.class),
            new ActionHandler<>(ClearRolesCacheAction.INSTANCE, TransportClearRolesCacheAction.class),
            new ActionHandler<>(ClearPrivilegesCacheAction.INSTANCE, TransportClearPrivilegesCacheAction.class),
            new ActionHandler<>(ClearSecurityCacheAction.INSTANCE, TransportClearSecurityCacheAction.class),
            new ActionHandler<>(GetUsersAction.INSTANCE, TransportGetUsersAction.class),
            new ActionHandler<>(PutUserAction.INSTANCE, TransportPutUserAction.class),
            new ActionHandler<>(DeleteUserAction.INSTANCE, TransportDeleteUserAction.class),
            new ActionHandler<>(GetRolesAction.INSTANCE, TransportGetRolesAction.class),
            new ActionHandler<>(PutRoleAction.INSTANCE, TransportPutRoleAction.class),
            new ActionHandler<>(DeleteRoleAction.INSTANCE, TransportDeleteRoleAction.class),