tests/env.sh: Add aarch64 support

[albertofaria]

TODO:

• [ ] Wait for https://github.com/containers/crun-vm/pull/54 to be merged.
• [ ] Wait for proper aarch64 nested virt support to be available in Fedora.

[packit-as-a-service[bot]]

Ephemeral COPR build failed. @containers/packit-build please check.

[rhatdan]

@albertofaria what is the hold up on this one?

[albertofaria]

@albertofaria what is the hold up on this one?

I'm getting "Guest couldn't be provisioned: Artemis resource ended in 'error' state" failures most of the time from testing farm, thus haven't been able to validate the tests yet.