Apple Silicon builds

[chris-crone]

I've started looking at Apple Arm support and this is what I've found so far:

• OpenSSL appears to build
• Python will provide support soon
• Homebrew doesn't work on Arm
• PyNaCl doesn't appear to build for macOS 11 (on Intel, unable to test on Arm)
• PyInstaller doesn't generate Arm binaries

Working towards Docker Desktop support on Apple Arm: docker/roadmap#142

It appears that Rosetta allows the Intel version to launch:

$ arch
arm64
$ ./docker-compose --version
docker-compose version 1.27.4, build 40524192

Ongoing work in #7951