[refactor] Unify the export of user data via API (#15144)

* [refactor] unify how user data is exported via API

* test time via unix timestamp

modules/convert/repository.go

@@ -102,7 +102,7 @@ func innerToRepo(repo *models.Repository, mode models.AccessMode, isParent bool)
 
 	return &api.Repository{
 		ID:                        repo.ID,
-		Owner:                     ToUser(repo.Owner, mode != models.AccessModeNone, mode >= models.AccessModeAdmin),
+		Owner:                     ToUserWithAccessMode(repo.Owner, mode),
 		Name:                      repo.Name,
 		FullName:                  repo.FullName(),
 		Description:               repo.Description,