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/middleware/loggermw/logger.go

@@ -64,6 +64,7 @@ func (l *loggerImpl) Middleware() web.Middleware {
 			// put the start time on context so we can measure it later.
 			r = r.WithContext(log.InitstartTime(r.Context(), time.Now()))
 
+			//nolint:staticcheck // not yet migrated to OpenFeature
 			if l.flags.IsEnabled(r.Context(), featuremgmt.FlagUnifiedRequestLog) {
 				r = r.WithContext(errutil.SetUnifiedLogging(r.Context()))
 			}

pkg/middleware/request_metrics.go

@@ -114,6 +114,7 @@ func RequestMetrics(features featuremgmt.FeatureToggles, cfg *setting.Cfg, promR
 					handler = "notfound"
 				} else {
 					// log requests where we could not identify handler so we can register them.
+					//nolint:staticcheck // not yet migrated to OpenFeature
 					if features.IsEnabled(r.Context(), featuremgmt.FlagLogRequestsInstrumentedAsUnknown) {
 						log.Warn("request instrumented as unknown", "path", r.URL.Path, "status_code", status)
 					}