### 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/test/java/org/elasticsearch/cluster/routing/allocation/ShardsAvailabilityHealthIndicatorServiceTests.java
);
        assertThat(
            ACTION_INCREASE_SHARD_LIMIT_CLUSTER_SETTING.getUniqueId(),
            equalTo("elasticsearch:health:shards_availability:diagnosis:increase_shard_limit_cluster_setting")
        );
        assertThat(
            ACTION_INCREASE_SHARD_LIMIT_INDEX_SETTING.getUniqueId(),
            equalTo("elasticsearch:health:shards_availability:diagnosis:increase_shard_limit_index_setting")
        );
        assertThat(
            ACTION_MIGRATE_TIERS_AWAY_FROM_REQUIRE_DATA.getUniqueId(),
            equalTo("elasticsearch:health:shards_availability:diagnosis:migrate_data_tiers_require_data")
        );
        assertThat(
            ACTION_MIGRATE_TIERS_AWAY_FROM_INCLUDE_DATA.getUniqueId(),
            equalTo("elasticsearch:health:shards_availability:diagnosis:migrate_data_tiers_include_data")
        );
        assertThat(
            ACTION_INCREASE_NODE_CAPACITY.getUniqueId(),
            equalTo("elasticsearch:health:shards_availability:diagnosis:increase_node_capacity_for_allocations")
        );
        for (String tier : List.of("data_content", "data_hot", "data_warm", "data_cold", "data_frozen")) {
            assertThat(
                ACTION_ENABLE_TIERS_LOOKUP.get(tier).getUniqueId(),
                equalTo("elasticsearch:health:shards_availability:diagnosis:enable_data_tiers:tier:" + tier)
            );
            assertThat(
                ACTION_INCREASE_SHARD_LIMIT_INDEX_SETTING_LOOKUP.get(tier).getUniqueId(),
                equalTo("elasticsearch:health:shards_availability:diagnosis:increase_shard_limit_index_setting:tier:" + tier)
            );