[SPARK-32245][INFRA][FOLLOWUP] Reenable Github Actions on commit

This PR reenables GitHub Action on every commit as a next step.

We carefully enabled GitHub Action on every PRs, and it looks good so far.

As we saw at apache#29072, GitHub Action is already triggered at every commits on every PRs. Enabling GitHub Action on `master` branch commit doesn't make a big difference. And, we need to start to test at every commit as a next step.

No.

Manual.

Closes apache#29076 from dongjoon-hyun/reenable_gha_commit.

Authored-by: Dongjoon Hyun <dongjoon@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

.github/workflows/master.yml

@@ -1,6 +1,9 @@
 name: master
 
 on:
+  push:
+    branches:
+    - branch-2.4
   pull_request:
     branches:
     - branch-2.4