Add arm64 bottles

[glensc]

So that M1 users can benefit from them

[kabel]

While I'd love to have them, I don't have access to Apple silicon hardware and don't see that changing in the near future. Maybe someone has some spare agents to lend or can show me how to cross-compile on existing x86 agents.

[glensc]

Some quick search revealed:

• GitHub Actions: Apple Silicon (M1) powered macOS runners (Public Beta) github/roadmap#528
• Add ARM + MacOS target to be able to use on self-hosted runners actions/runner#805
• Support for VMs on Apple M1 actions/runner-images#2187