### 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
final List<Setting<?>> additionalSettings = new ArrayList<>(pluginsService.flatMap(Plugin::getSettings).toList());
            for (final ExecutorBuilder<?> builder : threadPool.builders()) {
                additionalSettings.addAll(builder.getRegisteredSettings());
            }
            client = new NodeClient(settings, threadPool);
            final ScriptModule scriptModule = new ScriptModule(settings, pluginsService.filterPlugins(ScriptPlugin.class));
            final ScriptService scriptService = newScriptService(
                settings,
                scriptModule.engines,
                scriptModule.contexts,
                threadPool::absoluteTimeInMillis
            );
            AnalysisModule analysisModule = new AnalysisModule(
                this.environment,
                pluginsService.filterPlugins(AnalysisPlugin.class),
                pluginsService.getStablePluginRegistry()
            );
            
            
            final Set<SettingUpgrader<?>> settingsUpgraders = pluginsService.flatMap(Plugin::getSettingUpgraders)
                .collect(Collectors.toSet());
            final SettingsModule settingsModule = new SettingsModule(
                settings,
                additionalSettings,
                pluginsService.flatMap(Plugin::getSettingsFilter).toList(),
                settingsUpgraders
            );
            
            
            nodeEnvironment = new NodeEnvironment(tmpSettings, environment);