Produce Arm64 version for Apple M1 machine

[richlander]

The current release requires that Rosetta is installed. Not everyone does that. Also, the download really should have the processor arch in it.

https://github.com/dotnet/cli-lab/releases

@coolcsh

[jrdodds]

dotnet-core-uninstall should be a universal binary.

The last Intel based mac model in Apple's product line was replaced in June 2023. All current models are using Apple Silicon chips.

[jrdodds]

Related #256