Time Series Panel: Support "TimeSeriesLong" without a User added Transform

With a frame like below, when the type is "timeseries-long", two series should be rendered by default. A long term benefit here is that this will set up tabular datasources (e.g. SQL) to not have to call LongToWide, which makes for a confusing experience for users when looking at the table view. In short, the left should look like the right without the prepare time series transform in order to make the time series visualization compliant with the data plane contract [TimeSeries Kind and Long format](https://github.com/grafana/grafana-plugin-sdk-go/blob/main/data/contract_docs/timeseries.md#time-series-long-format-timeserieslong-sql-like).  ```json [ { "schema": { "meta": { "type": "timeseries-long" }, "fields": [ { "name": "t", "type": "time", "typeInfo": { "frame": "time.Time" } }, { "type": "number", "name": "slothCount", "typeInfo": { "frame": "float64" } }, { "type": "string", "name": "city", "typeInfo": { "frame": "string" } } ] }, "data": { "values": [ [ 1664901845976, 1664901845976, 1664902845976, 1664902845976 ], [ 3, 6, 5, 9 ], [ "LGA", "MIA", "LGA", "MIA" ] ] } } ] ```