feat(repodb): sync-repodb WIP (#1241)

Signed-off-by: Laurentiu Niculae <niculae.laurentiu1@gmail.com>

pkg/test/common_test.go

@@ -6,6 +6,7 @@ package test_test
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 	"path"
@@ -23,6 +24,8 @@ import (
 	"zotregistry.io/zot/pkg/test"
 )
 
+var ErrTestError = errors.New("test error")
+
 func TestCopyFiles(t *testing.T) {
 	Convey("sourceDir does not exist", t, func() {
 		err := test.CopyFiles("/path/to/some/unexisting/directory", os.TempDir())