add test in ci workflow

Author: bisgaard-itis

.github/workflows/ci-testing-deploy.yml

@@ -2916,6 +2916,6 @@ jobs:
         uses: actions/checkout@v4
       - name: Check openapi-specs backwards compatibility
         run: |
-          cd source
-          uv venv .venv && source .venv/bin/activate
-          make openapi-specs
+          bash ci/github/helpers/openapi-specs-backwards-compatibility.bash \
+            https://raw.githubusercontent.com/${{ github.event.pull_request.base.repo.full_name }}/refs/heads/${{ github.event.pull_request.base.ref }} \
+            .