Git client will follow 301 but 307 (#34005)

Fix #28460

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit 356b707dde00f61f806c8a27879830a1d9b5b895)

services/context/repo.go

@@ -361,7 +361,9 @@ func RedirectToRepo(ctx *Base, redirectRepoID int64) {
 	if ctx.Req.URL.RawQuery != "" {
 		redirectPath += "?" + ctx.Req.URL.RawQuery
 	}
-	ctx.Redirect(path.Join(setting.AppSubURL, redirectPath), http.StatusTemporaryRedirect)
+	// Git client needs a 301 redirect by default to follow the new location
+	// It's not documentated in git documentation, but it's the behavior of git client
+	ctx.Redirect(path.Join(setting.AppSubURL, redirectPath), http.StatusMovedPermanently)
 }
 
 func repoAssignment(ctx *Context, repo *repo_model.Repository) {