[jdk11u-dev] RFR: 8340671: GHA: Bump macOS and Xcode versions to macos-12 and XCode 13.4.1

[duke]

On Tue, 24 Sep 2024 20:01:56 GMT, Antonio Vieiro <duke at openjdk.org> wrote:

> The macos-11 github runners [were deprecated and removed in June 2024](https://github.blog/changelog/2024-05-20-actions-upcoming-changes-to-github-hosted-macos-runners/) , making the macos tests to hang in openjdk11u-dev (and other OpenJDK repositories).
> 
> [JDK-8335793 GHA: Bump macOS and Xcode versions](https://bugs.openjdk.org/browse/JDK-8335793) upgraded the version https://github.com/openjdk/jdk11u-dev/pull/2835 of mac runners to macos-13. This upgrade in github runners required a long list of changes in openjdk11u-dev that proved difficult to review.
> 
> In order to ease the review process this PR downgrades the version of github runners in jdk11u-dev from the current macos-13 to macos-12 and xcode-13.4.1. This will require a single backport of [JDK-8299254 Support dealing with standard assert macro](https://bugs.openjdk.org/browse/JDK-8299254) (a follow-up to this PR), making the review process easier.
> 
> Once the github actions are running again in macos-12 an upgrade to macos-13 could be performed, if required, with some more additional PRs.

@vieiro 
Your change (at version e7ab1def6b31b1cad25322430d1ca6a3fe09388d) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk11u-dev/pull/2940#issuecomment-2376068134