build: add test matrix for multiple python versions

.github/workflows/test.yml

@@ -87,9 +87,46 @@ jobs:
       - name: Check Python Format
         run: make format-check-python-standalone
 
+  build-python:
+    name: Build Python bindings
+    runs-on: ubuntu-latest
+    outputs:
+      python_versions: ${{ steps.python-versions.outputs.value }}
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          lfs: true
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Pull Development Image
+        run: docker pull ${{ env.DOCKER_REGISTRY_PATH }}/${{ inputs.project_name }}-development:${{ inputs.project_version }}
+      - name: Build Python Bindings
+        run: make build-packages-python-standalone
+      - name: Upload Python Bindings
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-bindings # TBM: use a different namespace than in build-packages for now.
+          path: packages/python/
+      - id: python-versions
+        name: Export Python Versions to Environment
+        run: |
+          python_versions=$(echo -n "["; find packages/python -name "*.whl" | grep -o "py[0-9]\{2,3\}" | sed 's/py\([0-9]\)\([0-9][0-9]\?\)/\1.\2/' | sed "s/\([0-9.]*\)/'\1'/" | tr '\n' ',' | sed 's/,$//'; echo "]")
+          echo "Python versions: ${python_versions}"
+          echo "value=${python_versions}" >> $GITHUB_OUTPUT
+
   test-unit-python:
     name: Run Python Unit Tests
     runs-on: ubuntu-latest
+    needs:
+      - build-python
+    strategy:
+      matrix:
+        python-version: ${{ fromJson(needs.build-python.outputs.python_versions) }}
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
@@ -103,5 +140,10 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Pull Development Image
         run: docker pull ${{ env.DOCKER_REGISTRY_PATH }}/${{ inputs.project_name }}-development:${{ inputs.project_version }}
+      - name: Download Python packages
+        uses: actions/download-artifact@v4
+        with:
+          name: python-bindings
+          path: packages/python/
       - name: Run Unit Tests Python
-        run: make test-unit-python-standalone
+        run: make ci-test-python ${{ format('test_python_version={0}', matrix.python-version) }}