Change the get data stream api to include the following properties of a data stream:

- ~~Add `index_mode` from `DataStream` to the response.~~
- For each backing index of a data stream with time series index mode, include the temporal range the backing index represents (based on the `index.time_series.start_time` and `index.time_series.end_time` index settings.
server/src/main/java/org/elasticsearch/action/datastreams/GetDataStreamAction.java
public static final ParseField DATASTREAMS_FIELD = new ParseField("data_streams");
        public static class DataStreamInfo implements SimpleDiffable<DataStreamInfo>, ToXContentObject {
            public static final ParseField STATUS_FIELD = new ParseField("status");
            public static final ParseField INDEX_TEMPLATE_FIELD = new ParseField("template");
            public static final ParseField ILM_POLICY_FIELD = new ParseField("ilm_policy");
            public static final ParseField HIDDEN_FIELD = new ParseField("hidden");
            public static final ParseField SYSTEM_FIELD = new ParseField("system");
            public static final ParseField ALLOW_CUSTOM_ROUTING = new ParseField("allow_custom_routing");