chore: verify e2e workflow is up to date in CI (#1143)

Signed-off-by: Charles-Edouard Brétéché <[email protected]>

.github/workflows/check-codegen.yml

@@ -0,0 +1,33 @@
+name: Verify codegen
+
+permissions: {}
+
+on:
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  verify-e2e-workflow:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - name: Set up Go 
+        uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
+        with:
+          go-version-file: .hack/chainsaw-matrix/go.mod
+          cache-dependency-path: .hack/chainsaw-matrix/go.sum
+      - name: Generate workflow
+        run: |
+          set -e
+          (cd .hack/chainsaw-matrix && go run . > ../../.github/workflows/test.yml)
+      - name: Check diff
+        run: |
+          set -e
+          git --no-pager diff .
+          git diff --quiet --exit-code .