Try to reimplement testing different architectures

[alessfg]

Proposed changes

Docker QEMU on GH actions was broken once upon a time. Let's see if it's no longer broken.

Checklist

Before creating a PR, run through this checklist and mark each as complete:

• [x] I have read the CONTRIBUTING document.
• [ ] I have added Molecule tests that prove my fix is effective or that my feature works.
• [ ] I have checked that any relevant Molecule tests pass after adding my changes.
• [ ] I have updated any relevant documentation (defaults/main/*.yml, README.md and CHANGELOG.md).

[alessfg]

Not entirely sure why, but the core issue here seems to relate to the number of platforms being tested in a job. As soon as it goes to >20 platforms, the pipeline fails. This only happens if QEMU is enabled. There are no limitations otherwise.

[alessfg]

Closing in favor of #740.