Add a doctor command to fix inconsistent run status (#35840)

[Zettat123]

Backport #35840

#35783 fixes an actions rerun bug. Due to this bug, some runs may be incorrectly marked as StatusWaiting even though all the jobs are in done status. These runs cannot be run or cancelled. This PR adds a new doctor command to fix the inconsistent run status.

gitea doctor check --run fix-actions-unfinished-run-status --fix

Thanks to @ChristopherHX for the test.

[lutinglt]

Perhaps we should add a timeout period for waiting for scheduling? Marking exceeding the waiting time as an error.

[Zettat123]

Perhaps we should add a timeout period for waiting for scheduling? Marking exceeding the waiting time as an error.

We have a cron task to clear jobs that have been in StatusWaiting for a long time.

gitea/services/actions/clear_tasks.go

Lines 179 to 184 in 850012b

	// CancelAbandonedJobs cancels jobs that have not been picked by any runner for a long time
	func CancelAbandonedJobs(ctx context.Context) error {
	jobs, err := db.Find[actions_model.ActionRunJob](ctx, actions_model.FindRunJobOptions{
	Statuses: []actions_model.Status{actions_model.StatusWaiting, actions_model.StatusBlocked},
	UpdatedBefore: timeutil.TimeStampNow().AddDuration(-setting.Actions.AbandonedJobTimeout),
	})

But CancelAbandonedJobs doesn't check runs. Maybe we should improve it to make it check runs in StatusWaiting or StatusBlocked status.