Add AmazonLinux 2023 to CI Pipleline

[kdvalin]

Summary

Adds Amazon Linux 2023 (both x86_64 and aarch64) to the CI pipeline and eventual publishing to packagecloud.

Changes

ci.yml: Add support for different arch's, since previously crun downloads were hardcoded to amd64 arch. whatami: Detect /etc/amazon-release before defaulting to /etc/os-release