- Use Apple silicon images
  o See https://github.blog/changelog/2024-01-30-github-actions-introducing-the-new-m1-macos-runner-available-to-open-source
 - Bump GH actions
  o Old ones based on Node 16 are deprecated
 - Merge Linux toolchain installation step
 - Use svenstaro/upload-release-action commit hash
 - Reuse env variables

Required due to brew adopting PEP 668
https://github.com/orgs/Homebrew/discussions/3404

Download the big file first (BaseSystem) and then the chunklist may result in a token timeout for people with slow internet connections, to work around this simply moving the order of download so that the chunklist downloads first solves this issue.

Thx @Macschrauber