Setup workflow running on arm64

[ahrtr]

Refer to etcd-io/etcd#16801

[jmhbnz]

@ahrtr Can you please create the "contribfest" label for etcd-io/bbolt, I think this issue would be a great candidate for the upcoming etcd contribfest at kubecon 🙏🏻

[ahrtr]

done @jmhbnz

[ivanvc]

Can I be assigned to this one?