test: add cross-build end-to-end test

This commit uses the new `build --arch=` support to perform
a cross arch build for aarch64, ppc64le, riscv64, s390x on
fedora. We could do also centos-9 each arch is already 20min.

.github/workflows/pytest.yaml

@@ -34,6 +34,8 @@ jobs:
         run: |
           sudo apt update
           sudo apt install -y python3-pytest golang
+      - name: Install cross build dependencies
+        run: sudo apt install -y qemu-user-static
 
       - name: Run integration tests via pytest
         run: |