Make it safe to run new config CRUD APIs in DS API server

Using `configCrudUseNewApis` passed through for DS API servers from the
`grafana-enterprise` codebase.

pkg/registry/apis/datasource/connections.go

@@ -0,0 +1,59 @@
+package datasource
+
+import (
+	"context"
+
+	"github.com/grafana/grafana/pkg/apimachinery/utils"
+	"k8s.io/apimachinery/pkg/apis/meta/internalversion"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apiserver/pkg/registry/rest"
+)
+
+var (
+	_ rest.Scoper               = (*connectionAccess)(nil)
+	_ rest.SingularNameProvider = (*connectionAccess)(nil)
+	_ rest.Getter               = (*connectionAccess)(nil)
+	_ rest.Lister               = (*connectionAccess)(nil)
+	_ rest.Storage              = (*connectionAccess)(nil)
+)
+
+type connectionAccess struct {
+	resourceInfo   utils.ResourceInfo
+	tableConverter rest.TableConvertor
+	datasources    PluginDatasourceProvider
+}
+
+func (s *connectionAccess) New() runtime.Object {
+	return s.resourceInfo.NewFunc()
+}
+
+func (s *connectionAccess) Destroy() {}
+
+func (s *connectionAccess) NamespaceScoped() bool {
+	return true
+}
+
+func (s *connectionAccess) GetSingularName() string {
+	return s.resourceInfo.GetSingularName()
+}
+
+func (s *connectionAccess) ShortNames() []string {
+	return s.resourceInfo.GetShortNames()
+}
+
+func (s *connectionAccess) NewList() runtime.Object {
+	return s.resourceInfo.NewListFunc()
+}
+
+func (s *connectionAccess) ConvertToTable(ctx context.Context, object runtime.Object, tableOptions runtime.Object) (*metav1.Table, error) {
+	return s.tableConverter.ConvertToTable(ctx, object, tableOptions)
+}
+
+func (s *connectionAccess) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
+	return s.datasources.GetDataSource(ctx, name)
+}
+
+func (s *connectionAccess) List(ctx context.Context, options *internalversion.ListOptions) (runtime.Object, error) {
+	return s.datasources.ListDataSources(ctx)
+}