add dummy github action (#5422)

Co-authored-by: Junpu Fan <junpu@amazon.com>

Author: aws-dlinfra-bot

.github/workflows/noop.yml

@@ -0,0 +1,13 @@
+name: noop
+on: [push]
+jobs:
+  noop:
+    runs-on:
+      - codebuild-test1-${{ github.run_id }}-${{ github.run_attempt }}
+    steps:
+      - name: checkout github code
+        uses: actions/checkout@v4
+      - name: check github files
+        shell: bash
+        run: |
+          cat README.md