chore : Deprecating FeatureToggles.IsEnabledGlobally (#112885)

* add deprecation on featuremgmt.IsEnabledGlobally

* add nolint reason

* add reasonable deprecation message

* remove junk edits

* add more nolints

* addressing review comments

* Update pkg/services/featuremgmt/models.go

Co-authored-by: Dave Henderson <dave.henderson@grafana.com>

---------

Co-authored-by: Dave Henderson <dave.henderson@grafana.com>

pkg/registry/apis/datasource/register.go

@@ -63,9 +63,11 @@ func RegisterAPIService(
 	reg prometheus.Registerer,
 ) (*DataSourceAPIBuilder, error) {
 	// We want to expose just a limited set of plugins
+	//nolint:staticcheck // not yet migrated to OpenFeature
 	explicitPluginList := features.IsEnabledGlobally(featuremgmt.FlagDatasourceAPIServers)
 
 	// This requires devmode!
+	//nolint:staticcheck // not yet migrated to OpenFeature
 	if !explicitPluginList && !features.IsEnabledGlobally(featuremgmt.FlagGrafanaAPIServerWithExperimentalAPIs) {
 		return nil, nil // skip registration unless opting into experimental apis
 	}
@@ -111,6 +113,7 @@ func RegisterAPIService(
 			datasources.GetDatasourceProvider(pluginJSON),
 			contextProvider,
 			accessControl,
+			//nolint:staticcheck // not yet migrated to OpenFeature
 			features.IsEnabledGlobally(featuremgmt.FlagDatasourceQueryTypes),
 			false,
 		)