Enable x86_64-darwin, aarch64-darwin nix builds

[carbolymer]

Changelog

- description: |
    Enable x86_64-darwin, aarch64-darwin nix builds
# uncomment types applicable to the change:
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  # - feature        # introduces a new feature
  # - breaking       # the API has changed in a breaking way
  # - compatible     # the API has changed but is non-breaking
  # - optimisation   # measurable performance improvements
  # - improvement    # QoL changes e.g. refactoring
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  # - test           # fixes/modifies tests
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  # - release        # related to a new release preparation
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• [ ] Self-reviewed the diff

[angerman]

We don't have native aarch64-Linux builders. This will go through qemu on x86_64-linux and be really slow.

We can do x86_64-linux -> aarch64-linux cross though.

I'd strongly suggest against asrch64-linux native.

If we do consider this a necessity, we need to get a native arch64 machine.

[carbolymer]

@angerman Thanks for the explanation and review! We're still evaluating if we need extra architectures built in CLI repo and is the extra build time worth it.

[angerman]

@angerman Thanks for the explanation and review! We're still evaluating if we need extra architectures built in CLI repo and is the extra build time worth it.

Cross compiling to aarch64-Linux works quite well.

[smelc]

@carbolymer> any plan to merge this one soon? We definitely want this one merged before the next release of the CLI.