Transformations: Move formatString transformation to private preview (#79498)

* Move moving average and cumulative sum to private preview

* update docs

* move formatString to private preview

* rebuild docs

* undo changes that don't belong to this commit

* undo cumulative/window featureflag

* fix case

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

@@ -519,7 +519,7 @@ Use this transformation to customize the output of a string field. This transfor
 
 This transformation provides a convenient way to standardize and tailor the presentation of string data for better visualization and analysis.
 
-> **Note:** This transformation is an experimental feature. Engineering and on-call support is not available. Documentation is either limited or not provided outside of code comments. No SLA is provided. Enable the **formatString** feature toggle in Grafana to use this feature. Contact Grafana Support to enable this feature in Grafana Cloud.
+> **Note:** This transformation is currently in private preview. Grafana Labs offers support on a best-effort basis, and breaking changes might occur prior to the feature being made generally available.
 
 ### Format time
 

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

@@ -143,7 +143,6 @@ Experimental features might be changed or removed without prior notice.
 | `idForwarding`                              | Generate signed id token for identity that can be forwarded to plugins and external services                                                                                                                                                                                      |
 | `panelMonitoring`                           | Enables panel monitoring through logs and measurements                                                                                                                                                                                                                            |
 | `enableNativeHTTPHistogram`                 | Enables native HTTP Histograms                                                                                                                                                                                                                                                    |
-| `formatString`                              | Enable format string transformer                                                                                                                                                                                                                                                  |
 | `kubernetesPlaylists`                       | Use the kubernetes API in the frontend for playlists, and route /api/playlist requests to k8s                                                                                                                                                                                     |
 | `kubernetesSnapshots`                       | Use the kubernetes API in the frontend to support playlists                                                                                                                                                                                                                       |
 | `recoveryThreshold`                         | Enables feature recovery threshold (aka hysteresis) for threshold server-side expression                                                                                                                                                                                          |

pkg/services/featuremgmt/registry.go

@@ -982,7 +982,7 @@ var (
 		{
 			Name:         "formatString",
 			Description:  "Enable format string transformer",
-			Stage:        FeatureStageExperimental,
+			Stage:        FeatureStagePrivatePreview,
 			FrontendOnly: true,
 			Owner:        grafanaBiSquad,
 			Created:      time.Date(2023, time.October, 13, 12, 0, 0, 0, time.UTC),

pkg/services/featuremgmt/toggles_gen.csv

@@ -114,7 +114,7 @@ cloudWatchWildCardDimensionValues,GA,@grafana/aws-datasources,2023-09-27,false,f
 externalServiceAccounts,experimental,@grafana/identity-access-team,2023-09-28,true,false,false,false
 panelMonitoring,experimental,@grafana/dataviz-squad,2023-10-08,false,false,false,true
 enableNativeHTTPHistogram,experimental,@grafana/hosted-grafana-team,2023-10-03,false,false,false,false
-formatString,experimental,@grafana/grafana-bi-squad,2023-10-13,false,false,false,true
+formatString,privatePreview,@grafana/grafana-bi-squad,2023-10-13,false,false,false,true
 transformationsVariableSupport,preview,@grafana/grafana-bi-squad,2023-10-04,false,false,false,true
 kubernetesPlaylists,experimental,@grafana/grafana-app-platform-squad,2023-11-08,false,false,true,false
 kubernetesSnapshots,experimental,@grafana/grafana-app-platform-squad,2023-12-04,false,false,true,false

public/app/features/transformers/docs/content.ts

@@ -501,8 +501,7 @@ export const transformationDocsContent: TransformationDocsContentType = {
 
   This transformation provides a convenient way to standardize and tailor the presentation of string data for better visualization and analysis.
 
-  > **Note:** This transformation is an experimental feature. Engineering and on-call support is not available. Documentation is either limited or not provided outside of code comments. No SLA is provided. Enable the **formatString** feature toggle in Grafana to use this feature. Contact Grafana Support to enable this feature in Grafana Cloud.
-  `;
+  > **Note:** This transformation is currently in private preview. Grafana Labs offers support on a best-effort basis, and breaking changes might occur prior to the feature being made generally available.`;
     },
   },
   formatTime: {