Add MacOS m1 Runner & move target aarch64 to this runner

[Owen-CH-Leung]

fixes #1952

This PR enhances the generate-ci command for github actions. Specifically, it addes a new CI job to be running on macos m1 runner, and move away cross compilation to aarch64 from the original mac runner.

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[messense]

Thanks!

I might tweak it a bit later to merge macos arm64 with macos using a different matrix like:

matrix:
  platform:
    - os: macos-latest
      target: x86_64
    - os: macos-14
      target: aarch64

Feel free take this refactoring task if you want to.