### Description

Elasticsearch defines the concept of a [feature](https://www.elastic.co/guide/en/elasticsearch/reference/current/get-features-api.html) for the purpose of better managing them when snapshotting/restoring them via the [feature_states field](https://www.elastic.co/guide/en/elasticsearch/reference/current/create-snapshot-api.html#create-snapshot-api-feature-states)

The `shards_availability` health indicator currently diagnoses the condition of indices needing to be [restored from a snapshot](https://github.com/elastic/elasticsearch/blob/main/server/src/main/java/org/elasticsearch/cluster/routing/allocation/ShardsAvailabilityHealthIndicatorService.java#L138) and recommends a [troubleshooting guide](http://ela.st/restore-snapshot)

However, since `8.x` the restore API **must** use `feature_states` instead of specifying systems indices or system data streams as part of the `indices` field.

This proposes the `affected_resources` for the `restore_from_snapshot` diagnosis return the indices that are not part of a `feature` under the `INDICES` type, and a new type `FEATURES`.
e.g. instead of current behaviour
```
"affected_resources": {
  "indices": [
    ".geoip_databases",
    "test_index"
    ]
}
```
we could return:
```
"affected_resources": {
  "indices": [
    "test_index"
   ], 
  "features": [
     "geoip"
  ]
}
```



server/src/main/java/org/elasticsearch/node/Node.java
);
    }
    private Node stop() {
        if (lifecycle.moveToStopped() == false) {
            return this;
        }
        logger.info("stopping ...");
        if (ReadinessService.enabled(environment)) {
            injector.getInstance(ReadinessService.class).stop();
        }
        injector.getInstance(FileSettingsService.class).stop();
        injector.getInstance(ResourceWatcherService.class).close();
        injector.getInstance(HttpServerTransport.class).stop();
        injector.getInstance(SnapshotsService.class).stop();
        injector.getInstance(SnapshotShardsService.class).stop();
        injector.getInstance(RepositoriesService.class).stop();
        
        injector.getInstance(IndicesClusterStateService.class).stop();
        
        
        injector.getInstance(Coordinator.class).stop();
        
        injector.getInstance(ClusterService.class).stop();
        injector.getInstance(NodeConnectionsService.class).stop();
        injector.getInstance(FsHealthService.class).stop();
        nodeService.getMonitorService().stop();
        injector.getInstance(GatewayService.class).stop();
        injector.getInstance(SearchService.class).stop();
        injector.getInstance(TransportService.class).stop();
        pluginLifecycleComponents.forEach(LifecycleComponent::stop);