MacOS M1 Install Script support (arm64)

[max-dfinity]

Describe the feature or problem you'd like to solve
Currently, the install script does not support MacOSX M1 machines, because there is no download available at https://github.com/profclems/glab/releases/download/v1.22.0/glab_1.22.0_macOS_arm64.tar.gz

That causes the script to fail.

Propose a Solution
Add cross-compilation for the macOS_arm64 target

[clemsbot]

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