### 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(PersistedClusterStateService.class)
        );
        if (Assertions.ENABLED) {
            try {
                assert injector.getInstance(MetaStateService.class).loadFullState().v1().isEmpty();
                final NodeMetadata nodeMetadata = NodeMetadata.FORMAT.loadLatestState(
                    logger,
                    NamedXContentRegistry.EMPTY,
                    nodeEnvironment.nodeDataPaths()
                );
                assert nodeMetadata != null;
                assert nodeMetadata.nodeVersion().equals(Version.CURRENT);
                assert nodeMetadata.nodeId().equals(localNodeFactory.getNode().getId());
            } catch (IOException e) {
                assert false : e;
            }
        }
        
        
        final Metadata onDiskMetadata = gatewayMetaState.getPersistedState().getLastAcceptedState().metadata();
        assert onDiskMetadata != null : "metadata is null but shouldn't"; 
        validateNodeBeforeAcceptingRequests(
            new BootstrapContext(environment, onDiskMetadata),
            transportService.boundAddress(),
            pluginsService.flatMap(Plugin::getBootstrapChecks).toList()
        );
        clusterService.addStateApplier(transportService.getTaskManager());
        
        coordinator.start(); 
        clusterService.start();