### 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
recoverySettings,
                                clusterService,
                                snapshotFilesProvider
                            )
                        );
                }
                b.bind(HttpServerTransport.class).toInstance(httpServerTransport);
                pluginComponents.forEach(p -> {
                    @SuppressWarnings("unchecked")
                    Class<Object> pluginClass = (Class<Object>) p.getClass();
                    b.bind(pluginClass).toInstance(p);
                });
                b.bind(PersistentTasksService.class).toInstance(persistentTasksService);
                b.bind(PersistentTasksClusterService.class).toInstance(persistentTasksClusterService);
                b.bind(PersistentTasksExecutorRegistry.class).toInstance(registry);
                b.bind(RepositoriesService.class).toInstance(repositoryService);
                b.bind(SnapshotsService.class).toInstance(snapshotsService);
                b.bind(SnapshotShardsService.class).toInstance(snapshotShardsService);
                b.bind(RestoreService.class).toInstance(restoreService);
                b.bind(RerouteService.class).toInstance(rerouteService);
                b.bind(ShardLimitValidator.class).toInstance(shardLimitValidator);
                b.bind(FsHealthService.class).toInstance(fsHealthService);
                b.bind(SystemIndices.class).toInstance(systemIndices);
                b.bind(PluginShutdownService.class).toInstance(pluginShutdownService);
                b.bind(ExecutorSelector.class).toInstance(executorSelector);
                b.bind(IndexSettingProviders.class).toInstance(indexSettingProviders);
                b.bind(DesiredNodesSettingsValidator.class).toInstance(desiredNodesSettingsValidator);
                b.bind(HealthService.class).toInstance(healthService);
                b.bind(MasterHistoryService.class).toInstance(masterHistoryService);
                b.bind(CoordinationDiagnosticsService.class).toInstance(coordinationDiagnosticsService);