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/services/caching/service.go

@@ -210,6 +210,7 @@ func (c *CachingServiceClient) WithQueryDataCaching(ctx context.Context, req *ba
 	// Update the query cache with the result for this metrics request
 	if err == nil && cr.UpdateCacheFn != nil {
 		// If AWS async caching is not enabled, use the old code path
+		//nolint:staticcheck // not yet migrated to OpenFeature
 		if c.features == nil || !c.features.IsEnabled(ctx, featuremgmt.FlagAwsAsyncQueryCaching) {
 			cr.UpdateCacheFn(ctx, resp)
 		} else if reqCtx != nil {