Feature Toggles: Create API for updating feature toggle state from the feature toggle admin page (#73022)

* create roles for writing feature toggles

* create update endpoint / handler

* api changes

* add feature toggle validations

* hide toggles based on their state

* make FlagFeatureToggle read only

* add username log

* add username string

* refactor for better readability

* refactor unit tests so we can do more validations

* some skeletoning for the set tests

* write unit tests for updater

* break helper functions out

* update sample ini to match defaults

* add more logic to ReadOnly label

* add user documentation

* fix lint issue

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: J Stickler <julie.stickler@grafana.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: J Stickler <julie.stickler@grafana.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: J Stickler <julie.stickler@grafana.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: J Stickler <julie.stickler@grafana.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: J Stickler <julie.stickler@grafana.com>

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: J Stickler <julie.stickler@grafana.com>

---------

Co-authored-by: IbrahimCSAE <ibrahim.mdev@gmail.com>
Co-authored-by: J Stickler <julie.stickler@grafana.com>

pkg/api/accesscontrol.go

@@ -434,6 +434,19 @@ func (hs *HTTPServer) declareFixedRoles() error {
 		Grants: []string{"Admin"},
 	}
 
+	featuremgmtWriterRole := ac.RoleRegistration{
+		Role: ac.RoleDTO{
+			Name:        "fixed:featuremgmt:writer",
+			DisplayName: "Feature Management writer",
+			Description: "Write feature toggles",
+			Group:       "Feature Management",
+			Permissions: []ac.Permission{
+				{Action: ac.ActionFeatureManagementWrite},
+			},
+		},
+		Grants: []string{"Admin"},
+	}
+
 	return hs.accesscontrolService.DeclareFixedRoles(
 		provisioningWriterRole, datasourcesReaderRole, builtInDatasourceReader, datasourcesWriterRole,
 		datasourcesIdReaderRole, orgReaderRole, orgWriterRole,
@@ -441,7 +454,7 @@ func (hs *HTTPServer) declareFixedRoles() error {
 		annotationsReaderRole, dashboardAnnotationsWriterRole, annotationsWriterRole,
 		dashboardsCreatorRole, dashboardsReaderRole, dashboardsWriterRole,
 		foldersCreatorRole, foldersReaderRole, foldersWriterRole, apikeyReaderRole, apikeyWriterRole,
-		publicDashboardsWriterRole, featuremgmtReaderRole,
+		publicDashboardsWriterRole, featuremgmtReaderRole, featuremgmtWriterRole,
 	)
 }