chore : Deprecating FeatureToggles.IsEnabled (#113062)

* Deprecating features.IsEnabled

* add one more nolint

* add one more nolint

* Give better hints to devs in the deprecation message of IsEnabledGlobally

* adding more doc strings

* fix linter after rebase

* Extend deprecation message

pkg/expr/converter.go

@@ -29,6 +29,7 @@ func (c *ResultConverter) Convert(ctx context.Context,
 	}
 
 	var dt data.FrameType
+	//nolint:staticcheck // not yet migrated to OpenFeature
 	dt, useDataplane, _ := shouldUseDataplane(frames, logger, c.Features.IsEnabled(ctx, featuremgmt.FlagDisableSSEDataplane))
 	if useDataplane {
 		logger.Debug("Handling SSE data source query through dataplane", "datatype", dt)

pkg/expr/dataplane.go

@@ -70,6 +70,7 @@ func handleDataplaneFrames(ctx context.Context, tracer tracing.Tracer, features
 	case data.KindTimeSeries:
 		return handleDataplaneTimeseries(frames)
 	case data.KindNumeric:
+		//nolint:staticcheck // not yet migrated to OpenFeature
 		sortMetrics := !features.IsEnabled(ctx, featuremgmt.FlagDisableNumericMetricsSortingInExpressions)
 		return handleDataplaneNumeric(frames, sortMetrics)
 	default:

pkg/expr/graph.go

@@ -68,7 +68,7 @@ type DataPipeline []Node
 // map of the refId of the of each command
 func (dp *DataPipeline) execute(c context.Context, now time.Time, s *Service) (mathexp.Vars, error) {
 	vars := make(mathexp.Vars)
-
+	//nolint:staticcheck // not yet migrated to OpenFeature
 	groupByDSFlag := s.features.IsEnabled(c, featuremgmt.FlagSseGroupByDatasource)
 	// Execute datasource nodes first, and grouped by datasource.
 	if groupByDSFlag {