Display the version of runner in the runner list (#23490)

Close: #23489 

### Change
1. Add version column to action_runner table.
2. Read the runner version from the request header, and update it in DB.
3. Display version in runner list

### Screenshot

![image](https://user-images.githubusercontent.com/33891828/225220990-98bc0158-4403-4e6c-9805-31bbbc65a802.png)

models/migrations/v1_20/v248.go

@@ -0,0 +1,14 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_20 //nolint
+
+import "xorm.io/xorm"
+
+func AddVersionToActionRunner(x *xorm.Engine) error {
+	type ActionRunner struct {
+		Version string `xorm:"VARCHAR(64)"` // the version of act_runner
+	}
+
+	return x.Sync(new(ActionRunner))
+}