TimeSeries: "First" and "Last" values in legend are flipped

### What happened? In my timeseries panel, the "Last" value shown in the legend is really the first data point in the time series, and the "First" value shown is really the last data point. They are flipped.  Support snapshot attached. [debug-ambient light and temperature-2024-07-14 01_23_25.json.txt](https://github.com/user-attachments/files/16215301/debug-ambient.light.and.temperature-2024-07-14.01_23_25.json.txt) ### What did you expect to happen? The values displayed correctly. ### Did this work before? Yes, this is the first time I am setting the issue. ### How do we reproduce it? See support snapshot. ### Is the bug inside a dashboard panel? Yes, see attached. ### Environment (with versions)? Grafana: 11.0.0 OS: Windows 11 Browser: Chrome ### Grafana platform? None ### Datasource(s)? AWS Timestream