Add a new column schedule_id for action_run to track (#26975)

Fix #26971 

And the UI now will display it's scheduled but not triggered by a push.

<img width="954" alt="图片"
src="https://github.com/go-gitea/gitea/assets/81045/d211845c-457e-4c3e-af1f-a0d654d3f365">

models/migrations/v1_21/v275.go

@@ -0,0 +1,15 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_21 //nolint
+
+import (
+	"xorm.io/xorm"
+)
+
+func AddScheduleIDForActionRun(x *xorm.Engine) error {
+	type ActionRun struct {
+		ScheduleID int64
+	}
+	return x.Sync(new(ActionRun))
+}