Re-enable macOS CI runs once macos-latest runners are available in the microsoft org

[joperezr]

Description

After migrating from dotnet/aspire to microsoft/aspire, the macos-latest GitHub-hosted runners are not available (jobs sit in queued indefinitely). This is likely because macOS runners need to be explicitly enabled by an admin in the microsoft GitHub org's runner policies.

As a workaround, macOS CI jobs (build_cli_archive_macos and tests_requires_nugets_macos) have been temporarily disabled in .github/workflows/tests.yml.

Action Items

1. Request a microsoft org admin to enable macos-latest runners for the microsoft/aspire repository (Organization Settings -> Actions -> Runner groups/policies)
2. Once confirmed available, revert the commit that disabled macOS runs in tests.yml
3. Verify macOS CI jobs run successfully on a PR

Related

• PR Update CI workflow owner guards and repo references from dotnet to microsoft #15452 -- initial org migration changes
• PR Fix bicep files: update dotnet/aspire references to microsoft/aspire #15458 -- bicep file fix-up

[joperezr]

macOS runners are now working in the microsoft org — other PRs are picking up macos-latest jobs correctly. Closing as resolved.