Add workflow debug workflow

b/395119204

.github/workflows/workflow_debug.yaml

@@ -0,0 +1,30 @@
+name: Workflow Debug
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, labeled]
+    branches:
+      - main
+      - experimental/*
+      - feature/*
+  push:
+    branches:
+      - main
+      - experimental/*
+      - feature/*
+
+
+jobs:
+  debug:
+    runs-on: ubuntu-latest
+    permissions: {}
+    timeout-minutes: 10
+    steps:
+      - name: Print github
+        shell: bash
+        run: |
+          echo '${{ toJSON(github) }}' | jq '.'
+      - name: Print concurrency expression
+        shell: bash
+        run: |
+          echo "${{ github.workflow }}-${{ github.event_name }}-platform @ ${{ github.event.label.name || github.event.pull_request.number || github.sha }} @ ${{ github.event.label.name && github.event.pull_request.number || github.event.action }}"