[release/7.0] [workloads] Specify arm64 alias instead of arm in the arm64 pack

[github-actions]

Backport of #79555 to release/7.0

/cc @steveisok

Customer Impact

Testing

Risk

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this PR. If you have write-permissions please help me learn by adding exactly one area label.

[steveisok]

@carlossanlop this is a tell mode change

[carlossanlop]

@carlossanlop this is a tell mode change

Ok sounds good. Do you see anything concerning in the CI? There were lots of failures, but a big chunk of them were a git fetch error.

[carlossanlop]

Lots of CI failures in Apple OSs in the re-run:

Publishing build artifacts failed with an error: Not found PathtoPublish: /Users/runner/work/1/s/artifacts/log/

I opened an issue in arcade to track it: dotnet/arcade#12176

Nothing specific to arm64. I'll merge this @steveisok .

[steveisok]

Lots of CI failures in Apple OSs in the re-run:

Publishing build artifacts failed with an error: Not found PathtoPublish: /Users/runner/work/1/s/artifacts/log/

I opened an issue in arcade to track it: dotnet/arcade#12176

Nothing specific to arm64. I'll merge this @steveisok .

Should have been fixed with #80454

[carlossanlop]

Should have been fixed with #80454

The CI of this PR was started on Jan 10th at 6 AM, and the fix you linked was merged on Jan 11th at 12AM. That's why it wasn't reflected here.