### Elasticsearch Version

8.4, 8.5, 8.6

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

Darwin

### Problem Description

The shards availability indicator should always be reporting diagnosis when its status is RED/YELLOW.
However, when an index is on a data node that runs out of disk space it will report RED but no diagnosis.

### Steps to Reproduce

Have multi-node cluster where a data (non-master) node that hosts an index runs out of disk space (the index cannot relocate somewhere else).
Call the Health API and the output will be something along these lines:
```
    "shards_availability": {
      "status": "red",
      "symptom": "This cluster has all shards available.",
      "details": {
        "initializing_primaries": 1,
        "started_replicas": 0,
        "initializing_replicas": 0,
        "unassigned_primaries": 0,
        "started_primaries": 1,
        "creating_primaries": 0,
        "unassigned_replicas": 0,
        "restarting_primaries": 0,
        "restarting_replicas": 0
      },
      "impacts": [
        {
          "id": "elasticsearch:health:shards_availability:impact:primary_unassigned",
          "severity": 1,
          "description": "Cannot add data to 1 index [test_index]. Searches might return incomplete results.",
          "impact_areas": [
            "ingest",
            "search"
          ]
        }
      ] 
    }
``` 

### Logs (if relevant)

_No response_
server/src/main/java/org/elasticsearch/cluster/routing/allocation/ShardsAvailabilityHealthIndicatorService.java
SystemIndices.Feature::getName,
                        feature -> feature.getDataStreamDescriptors()
                            .stream()
                            .flatMap(descriptor -> descriptor.getBackingIndexNames(metadata).stream())
                            .collect(toSet())
                    )
                );
            
            
            for (Map.Entry<String, Set<String>> featureToBackingIndices : featureToDsBackingIndices.entrySet()) {
                for (String featureIndex : featureToBackingIndices.getValue()) {
                    if (restoreFromSnapshotIndices.contains(featureIndex)) {
                        affectedFeatureStates.add(featureToBackingIndices.getKey());
                        affectedIndices.remove(featureIndex);
                    }
                }
            }
            if (affectedIndices.isEmpty() == false) {
                affectedResources.add(new Diagnosis.Resource(INDEX, affectedIndices.stream().limit(maxAffectedResourcesCount).toList()));
            }
            if (affectedFeatureStates.isEmpty() == false) {
                affectedResources.add(
                    new Diagnosis.Resource(FEATURE_STATE, affectedFeatureStates.stream().limit(maxAffectedResourcesCount).toList())
                );
            }
            return affectedResources;
        }
    }
}