Add build-packages step for platform bridges in unit tests

Author: OskarStark

.github/workflows/unit-tests.yaml

@@ -230,6 +230,9 @@ jobs:
                   tools: flex
                   extensions: ${{ env.REQUIRED_PHP_EXTENSIONS }}
 
+            - name: Build packages
+              run: php .github/scripts/build-packages.php src/platform/src/Bridge/${{ matrix.bridge.bridge }}/composer.json
+
             - name: Install dependencies
               uses: ramsey/composer-install@v3
               with: