ci: Rewrite test-each-commit as py script

.github/workflows/ci.yml

@@ -81,7 +81,7 @@ jobs:
       - name: Compile and run tests
         run: |
           # Run tests on commits after the last merge commit and before the PR head commit
-          git rebase --exec "git merge --no-commit origin/${GITHUB_BASE_REF} && ./.github/ci-test-each-commit-exec.sh && git reset --hard" ${{ env.TEST_BASE }}
+          git rebase --exec "git merge --no-commit origin/${GITHUB_BASE_REF} && python3 ./.github/ci-test-each-commit-exec.py && git reset --hard" ${{ env.TEST_BASE }}
 
   macos-native-arm64:
     name: ${{ matrix.job-name }}