Sunset apple-silicon-m1 self-hosted runner, as now is supported by Github Hosted runners via macos-latest tag. Use macos-13 for runs on Intel macs

[misl6]

Maintainer merge checklist

• Title is descriptive/clear for inclusion in release notes.
• Applied a Component: xxx label.
• Applied the api-deprecation or api-break label.
• Applied the release-highlight label to be highlighted in release notes.
• Added to the milestone version it was merged into.
• Unittests are included in PR.
• Properly documented, including versionadded, versionchanged as needed.

The time has come, as being announced in https://github.blog/changelog/2024-04-01-macos-14-sonoma-is-generally-available-and-the-latest-macos-runner-image , macos-latest on kivy/kivy repo is already targeting macos-14, which is an Apple Silicon runner.

Therefore, our self-hosted apple-silicon-m1 runner, after ~1.5 years of service will start the sunset phase.

However, now comes an additional issue: "How can we make sure to properly test things for Intel Macs?".

As ATM https://github.com/orgs/community/discussions/116568, is still unanswered, targeting macos-13 for testing on an Intel runner looks like the best (free of charge) choice.
I guess the long-time alternative is macos-latest-large, which is a macos-14 image that runs on Intel Macs, but is quite pricey for us.

What will be the future of apple-silicon-m1 runner hardware?

• iOS Simulators?
• Android Emulators?

[github-actions]

The backport to devel-2.3.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-devel-2.3.x devel-2.3.x
# Navigate to the new working tree
cd .worktrees/backport-devel-2.3.x
# Create a new branch
git switch --create backport-8713-to-devel-2.3.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 9bb694f9e6bf065515c019594e603206753a1e5b
# Push it to GitHub
git push --set-upstream origin backport-8713-to-devel-2.3.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-devel-2.3.x

Then, create a pull request where the base branch is devel-2.3.x and the compare/head branch is backport-8713-to-devel-2.3.x.