DualWrite: Cleanup and centralize the dual write creation (#90013)

pkg/registry/apis/query/register.go

@@ -122,11 +122,6 @@ func (b *QueryAPIBuilder) GetGroupVersion() schema.GroupVersion {
 	return query.SchemeGroupVersion
 }
 
-func (b *QueryAPIBuilder) GetDesiredDualWriterMode(dualWrite bool, modeMap map[string]grafanarest.DualWriterMode) grafanarest.DualWriterMode {
-	// Add required configuration support in order to enable other modes. For an example, see pkg/registry/apis/playlist/register.go
-	return grafanarest.Mode0
-}
-
 func addKnownTypes(scheme *runtime.Scheme, gv schema.GroupVersion) {
 	scheme.AddKnownTypes(gv,
 		&query.DataSourceApiServer{},
@@ -148,8 +143,7 @@ func (b *QueryAPIBuilder) GetAPIGroupInfo(
 	scheme *runtime.Scheme,
 	codecs serializer.CodecFactory, // pointer?
 	optsGetter generic.RESTOptionsGetter,
-	_ grafanarest.DualWriterMode,
-	_ prometheus.Registerer,
+	_ grafanarest.DualWriteBuilder,
 ) (*genericapiserver.APIGroupInfo, error) {
 	gv := query.SchemeGroupVersion
 	apiGroupInfo := genericapiserver.NewDefaultAPIGroupInfo(gv.Group, scheme, metav1.ParameterCodec, codecs)