Authz: add support to use folder api to fetch folder tree (#100038)

* Add FolderStore interface

* Authz: add implementation to use folders api and use it inproc with loopback config

* Add tracing and add rest.Config for talking with folder api using access tokens

* Restructure test to get rid of circular dependencies in tests

* use correct group version kind

---------

Co-authored-by: gamab <gabriel.mabille@grafana.com>

pkg/storage/unified/apistore/prepare_test.go

@@ -13,9 +13,14 @@ import (
 	"github.com/stretchr/testify/require"
 	"golang.org/x/exp/rand"
 	"k8s.io/apimachinery/pkg/api/apitesting"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/serializer"
 	"k8s.io/apiserver/pkg/storage"
 )
 
+var scheme = runtime.NewScheme()
+var codecs = serializer.NewCodecFactory(scheme)
+
 func TestPrepareObjectForStorage(t *testing.T) {
 	_ = v0alpha1.AddToScheme(scheme)
 	node, err := snowflake.NewNode(rand.Int63n(1024))