feat: add pull request verify GA

Signed-off-by: Ramiz Polic <[email protected]>

.github/workflows/ci.yaml

@@ -285,3 +285,14 @@ jobs:
         run: nix develop --impure .#ci -c ./deploy/dev/multi-dc/test/multi-dc-raft.sh install
         env:
           OPERATOR_VERSION: ${{ needs.artifacts.outputs.container-image-tag }}
+
+  verify:
+    name: Verify
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+
+    steps:
+      - name: Block Merge Commits
+        uses: xt0rted/block-autosquash-commits-action@v2
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}