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/api.go

@@ -430,6 +430,7 @@ func (hs *HTTPServer) registerRoutes() {
 		if hs.Features.IsEnabled(featuremgmt.FlagFeatureToggleAdminPage) {
 			apiRoute.Group("/featuremgmt", func(featuremgmtRoute routing.RouteRegister) {
 				featuremgmtRoute.Get("/", authorize(ac.EvalPermission(ac.ActionFeatureManagementRead)), hs.GetFeatureToggles)
+				featuremgmtRoute.Post("/", authorize(ac.EvalPermission(ac.ActionFeatureManagementWrite)), hs.UpdateFeatureToggle)
 			})
 		}