[MM-8497] Ability to set Do Not Disturb for a specified period of time (#17680)

* Revert "Revert "[MM-8497] Ability to set Do Not Disturb for a specified period of time (#16067)" (#17657)"

This reverts commit ff383990f8.

* add debug log for recurring function

* add feature flag for dnd timed status

* refactoring changes

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

api4/status.go

@@ -106,7 +106,11 @@ func updateUserStatus(c *Context, w http.ResponseWriter, r *http.Request) {
 	case "away":
 		c.App.SetStatusAwayIfNeeded(c.Params.UserId, true)
 	case "dnd":
-		c.App.SetStatusDoNotDisturb(c.Params.UserId)
+		if c.App.Config().FeatureFlags.TimedDND {
+			c.App.SetStatusDoNotDisturbTimed(c.Params.UserId, status.DNDEndTime)
+		} else {
+			c.App.SetStatusDoNotDisturb(c.Params.UserId)
+		}
 	default:
 		c.SetInvalidParam("status")
 		return