Decrease the num_stars when deleting a repo (#11954)

* Decrease the  num_stars when deleting a repo

fix #11949

Signed-off-by: a1012112796 <1012112796@qq.com>

* Add migration

* use batch

* Apply suggestions from code review

Co-authored-by: Lauris BH <lauris@nix.lv>

* fix lint

* fix lint

* fix ci

* fix ci2

* add doctor

* duplicate code

* fix migration

* fix some nits

* add start

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/migrations/migrations.go

@@ -218,6 +218,8 @@ var migrations = []Migration{
 	NewMigration("Add KeepActivityPrivate to User table", addKeepActivityPrivateUserColumn),
 	// v142 -> v143
 	NewMigration("Ensure Repository.IsArchived is not null", setIsArchivedToFalse),
+	// v143 -> v144
+	NewMigration("recalculate Stars number for all user", recalculateStars),
 }
 
 // GetCurrentDBVersion returns the current db version