Plugins: Expose datasources as apiservers feature toggle (#93250)

pkg/registry/apis/datasource/register.go

@@ -58,8 +58,11 @@ func RegisterAPIService(
 	accessControl accesscontrol.AccessControl,
 	reg prometheus.Registerer,
 ) (*DataSourceAPIBuilder, error) {
+	// We want to expose just a limited set of plugins
+	explictPluginList := features.IsEnabledGlobally(featuremgmt.FlagDatasourceAPIServers)
+
 	// This requires devmode!
-	if !features.IsEnabledGlobally(featuremgmt.FlagGrafanaAPIServerWithExperimentalAPIs) {
+	if !(explictPluginList || features.IsEnabledGlobally(featuremgmt.FlagGrafanaAPIServerWithExperimentalAPIs)) {
 		return nil, nil // skip registration unless opting into experimental apis
 	}
 
@@ -73,7 +76,7 @@ func RegisterAPIService(
 	}
 
 	for _, ds := range all {
-		if !slices.Contains(ids, ds.ID) {
+		if explictPluginList && !slices.Contains(ids, ds.ID) {
 			continue // skip this one
 		}