Native Apple silicon support

Overview

Over at #1072 (closed), we documented the initial issues and workarounds with getting the GDK to run, with a focus on running under Rosetta 2 so as to not block new installs and favour the iterative approach.

This Issue will track updating the GDK to work natively on Apple Silicon, without the use of Rosetta 2.

External blockers

• Apple Silicon support in Homebrew
  • This is the big one as currently running brew fails on Apple Silicon as well as many brew packages not containing Apple Silicon support.

Handy links

• https://github.com/billycastelli/Silicon-Info
• https://github.com/DigiDNA/Silicon
• https://isapplesiliconready.com/

Outstanding Issues

1. Ensure asdf can compile all software defined in .tool-versions
2. Ensure brew works and can build all packages/casks - looks good! (21/10/2021)
3. Remove hardcoded arch -x86_64 calls which force running under Rosetta2
4. Resolve PumaWorkerKiller: Out of memory firing on fresh GDK install on Apple silicon
5. google-protobuf cannot run if installed via universal-darwin
6. ffi cannot run on native M1