### 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
injector.getInstance(SnapshotShardsService.class).start();
        injector.getInstance(RepositoriesService.class).start();
        injector.getInstance(SearchService.class).start();
        injector.getInstance(FsHealthService.class).start();
        nodeService.getMonitorService().start();
        final ClusterService clusterService = injector.getInstance(ClusterService.class);
        final NodeConnectionsService nodeConnectionsService = injector.getInstance(NodeConnectionsService.class);
        nodeConnectionsService.start();
        clusterService.setNodeConnectionsService(nodeConnectionsService);
        injector.getInstance(GatewayService.class).start();
        final Coordinator coordinator = injector.getInstance(Coordinator.class);
        clusterService.getMasterService().setClusterStatePublisher(coordinator);
        
        TransportService transportService = injector.getInstance(TransportService.class);
        transportService.getTaskManager().setTaskResultsService(injector.getInstance(TaskResultsService.class));
        transportService.getTaskManager().setTaskCancellationService(new TaskCancellationService(transportService));
        transportService.start();
        assert localNodeFactory.getNode() != null;
        assert transportService.getLocalNode().equals(localNodeFactory.getNode())
            : "transportService has a different local node than the factory provided";
        injector.getInstance(PeerRecoverySourceService.class).start();
        
        final GatewayMetaState gatewayMetaState = injector.getInstance(GatewayMetaState.class);
        gatewayMetaState.start(
            settings(),
            transportService,
            clusterService,
            injector.getInstance(MetaStateService.class),
            injector.getInstance(IndexMetadataVerifier.class),
            injector.getInstance(MetadataUpgrader.class),