adjust async workflow

Author: sfc-gh-pczajka

.github/workflows/build_test.yml

@@ -419,6 +419,13 @@ jobs:
         run: |
           gpg --quiet --batch --yes --decrypt --passphrase="$PARAMETERS_SECRET" \
           .github/workflows/parameters/public/parameters_${{ matrix.cloud-provider }}.py.gpg > test/parameters.py
+      - name: Setup private key file
+        shell: bash
+        env:
+          PYTHON_PRIVATE_KEY_SECRET: ${{ secrets.PYTHON_PRIVATE_KEY_SECRET }}
+        run: |
+          gpg --quiet --batch --yes --decrypt --passphrase="$PYTHON_PRIVATE_KEY_SECRET" \
+          .github/workflows/parameters/public/rsa_keys/rsa_key_python_${{ matrix.cloud-provider }}.p8.gpg > test/rsa_key_python_${{ matrix.cloud-provider }}.p8
       - name: Download wheel(s)
         uses: actions/download-artifact@v4
         with: