### Elasticsearch Version

master

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

all

### Problem Description

cat indices API in time_series mode is NPE, The reproduce steps is below:

### Steps to Reproduce

```
# step 1
PUT _index_template/test
{
  "index_patterns": [
    "test"
  ],
  "template": {
    "settings": {
      "index.routing_path": "foo"
    },
    "mappings": {
      "properties": {
        "foo": {
          "type": "keyword",
          "time_series_dimension": true
        }
      }
    }
  },
  "data_stream": {
    "index_mode": "time_series"
  }
}

# step 2
PUT _data_stream/test

# step 3
GET _cluster/state/metadata/test
GET _cat/indices/test?v
```
server/src/main/java/org/elasticsearch/cluster/metadata/DataStream.java
this(in.readString());
        }
        @Override
        public void writeTo(StreamOutput out) throws IOException {
            out.writeString(name);
        }
        @Override
        public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
            builder.startObject();
            builder.field(NAME_FIELD.getPreferredName(), name);
            builder.endObject();
            return builder;
        }
        public String getName() {
            return name;
        }
        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            TimestampField that = (TimestampField) o;
            return name.equals(that.name);
        }
        @Override
        public int hashCode() {
            return Objects.hash(name);
        }
    }
}