ci: add macOS and Windows builds to GitHub Actions, fix LC_ALL warning in Guix container, introduce artifact collection script for GitHub Actions

[kwvg]

Additional Information

• Depends on ci: merge bitcoin#27314, #28954, #29765, introduce dependency options in GitHub Actions builds, fix multiprocess builds #6400
• WINEPREFIX needs to be overridden because of permissions issues with GitHub Actions (build), SC2155 (info) has been suppressed as the expected syntax is clunky and unnecessary (if mktmp fails, wine would refuse to run due to invalid WINEPREFIX, which would trigger an error).
• The HOST check before running setup_sdk.sh isn't a part of the shell script itself as the script is written to not have to rely on external variables being set, so the caller is expected to know the conditions it'll impose to run setup_sdk.sh, the script itself remaining agnostic.
  • guix-start doesn't benefit from deduplication because the scripts there are expected to be self-contained and therefore, cannot link back to this script as it will not be present in the container.

Breaking Changes

None expected.

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas (note: N/A)
• I have added or updated relevant unit/integration/functional/e2e tests (note: N/A)
• I have made corresponding changes to the documentation (note: N/A)
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[kwvg]

GitHub Actions run for 66b7197, https://github.com/kwvg/dash/actions/runs/11955577182.

[kwvg]

GitHub Actions run for fe08442, https://github.com/kwvg/dash/actions/runs/11973573180

[kwvg]

GitLab Actions run for a5959da, https://github.com/kwvg/dash/actions/runs/11976668589.

[github-actions]

This pull request has conflicts, please rebase.