CI: Verify generated files

This CI verifies if the generated files are up to date in the project
and fails if anything has changed.

Signed-off-by: Lucas Alvares Gomes <lucasagomes@gmail.com>

Author: umago

.github/workflows/verify-generation.yaml

@@ -0,0 +1,32 @@
+name: "Verify generated files"
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  verify-generation:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version: '1.23'
+
+      - name: Install operator-sdk
+        uses: redhat-actions/openshift-tools-installer@v1
+        with:
+          source: github
+          operator-sdk: 1.38.0
+
+      - name: Verify generated files are up to date and fail if anything changed
+        run: |
+          make generate
+          make manifests
+          git diff --exit-code