Fix schedule tasks bugs (#28691)

Fix #28157

This PR fix the possible bugs about actions schedule.

- Move `UpdateRepositoryUnit` and `SetRepoDefaultBranch` from models to
service layer
- Remove schedules plan from database and cancel waiting & running
schedules tasks in this repository when actions unit has been disabled
or global disabled.
- Remove schedules plan from database and cancel waiting & running
schedules tasks in this repository when default branch changed.

(cherry picked from commit 97292da960)

Conflicts:
	modules/actions/github.go
	routers/web/repo/setting/default_branch.go
	routers/web/repo/setting/setting.go
	services/repository/branch.go
	services/repository/setting.go
	tests/integration/actions_trigger_test.go

services/actions/schedule_tasks.go

@@ -59,6 +59,7 @@ func startTasks(ctx context.Context) error {
 					row.RepoID,
 					row.Schedule.Ref,
 					row.Schedule.WorkflowID,
+					webhook_module.HookEventSchedule,
 				); err != nil {
 					log.Error("CancelRunningJobs: %v", err)
 				}
@@ -113,6 +114,7 @@ func CreateScheduleTask(ctx context.Context, cron *actions_model.ActionSchedule)
 		CommitSHA:     cron.CommitSHA,
 		Event:         cron.Event,
 		EventPayload:  cron.EventPayload,
+		TriggerEvent:  string(webhook_module.HookEventSchedule),
 		ScheduleID:    cron.ID,
 		Status:        actions_model.StatusWaiting,
 	}