[8.x] Include dispatchSync in the DispatchesJobs trait (#37063)

* Update DispatchesJobs.php

Include new dispatchSync

* Update DispatchesJobs.php

* add deprecation notice

Author: JacobBennett

src/Illuminate/Foundation/Bus/DispatchesJobs.php

@@ -22,9 +22,24 @@ protected function dispatch($job)
      *
      * @param  mixed  $job
      * @return mixed
+     *
+     * @deprecated Will be removed in a future Laravel version.
      */
     public function dispatchNow($job)
     {
         return app(Dispatcher::class)->dispatchNow($job);
     }
+
+    /**
+     * Dispatch a command to its appropriate handler in the current process.
+     *
+     * Queueable jobs will be dispatched to the "sync" queue.
+     *
+     * @param  mixed  $job
+     * @return mixed
+     */
+    public function dispatchSync($job)
+    {
+        return app(Dispatcher::class)->dispatchSync($job);
+    }
 }