Transformations: GA the Regression transformation (#106074)

* First draft of removing flag, regenerating flags and content

* Add description to catalog entry

* fix gdev dashboard

docs/sources/panels-visualizations/query-transform-data/transform-data/index.md

@@ -1484,8 +1484,6 @@ There are two different models:
 - **Polynomial regression** - Fits a polynomial function to the data.
   {{< figure src="/static/img/docs/transformations/polynomial-regression.png" class="docs-image--no-shadow" max-width= "1100px" alt="A time series visualization with a curved line representing the polynomial function" >}}
 
-> **Note:** This transformation is currently in public preview. Grafana Labs offers limited support, and breaking changes might occur prior to the feature being made generally available. Enable the `regressionTransformation` feature toggle in Grafana to use this feature. Contact Grafana Support to enable this feature in Grafana Cloud.
-
 [Table panel]: ref:table-panel
 [Calculation types]: ref:calculation-types
 [sparkline cell type]: ref:sparkline-cell-type

docs/sources/setup-grafana/configure-grafana/feature-toggles/index.md

@@ -103,7 +103,6 @@ Most [generally available](https://grafana.com/docs/release-life-cycle/#general-
 | `cloudWatchBatchQueries`          | Runs CloudWatch metrics queries as separate batches                                                    |
 | `pdfTables`                       | Enables generating table data as PDF in reporting                                                      |
 | `canvasPanelPanZoom`              | Allow pan and zoom in canvas panel                                                                     |
-| `regressionTransformation`        | Enables regression analysis transformation                                                             |
 | `alertingSaveStateCompressed`     | Enables the compressed protobuf-based alert state storage                                              |
 | `tableNextGen`                    | Allows access to the new react-data-grid based table component.                                        |
 | `enableSCIM`                      | Enables SCIM support for user and group management                                                     |