Move some repository related code into sub package (#19711)

* Move some repository related code into sub package

* Move more repository functions out of models

* Fix lint

* Some performance optimization for webhooks and others

* some refactors

* Fix lint

* Fix

* Update modules/repository/delete.go

Co-authored-by: delvh <dev.lh@web.de>

* Fix test

* Merge

* Fix test

* Fix test

* Fix test

* Fix test

Co-authored-by: delvh <dev.lh@web.de>

services/repository/review.go

@@ -0,0 +1,24 @@
+// Copyright 2022 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 (
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/organization"
+	"code.gitea.io/gitea/models/perm"
+	repo_model "code.gitea.io/gitea/models/repo"
+)
+
+// GetReviewerTeams get all teams can be requested to review
+func GetReviewerTeams(repo *repo_model.Repository) ([]*organization.Team, error) {
+	if err := repo.GetOwner(db.DefaultContext); err != nil {
+		return nil, err
+	}
+	if !repo.Owner.IsOrganization() {
+		return nil, nil
+	}
+
+	return organization.GetTeamsWithAccessToRepo(db.DefaultContext, repo.OwnerID, repo.ID, perm.AccessModeRead)
+}