Be able to pull images of different architectures

[cdrage]

Is your enhancement related to a problem? Please describe

When implementing #864 we cannot pull images by specifying the architecture. It will pull what matches your podman machine / podman architecture.

This makes it difficult to pull images that are ARM64.

Describe the solution you'd like

We need to implement containers/podman-desktop#9387

so we can add this functionality to the bootc extension

Describe alternatives you've considered

No response

Additional context

No response