Move some functions into services/repository (#17660)

services/repository/archive.go

@@ -0,0 +1,20 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package repository
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/storage"
+)
+
+// DeleteRepositoryArchives deletes all repositories' archives.
+func DeleteRepositoryArchives(ctx context.Context) error {
+	if err := models.DeleteAllRepoArchives(); err != nil {
+		return err
+	}
+	return storage.Clean(storage.RepoArchives)
+}