RFR: 7903850: JCStress: Upgrade GitHub Action Runner image for macOS [v2]

[Aleksey Shipilev]

On Tue, 1 Oct 2024 10:55:03 GMT, Johnny Lim <duke at openjdk.org> wrote:

>> This PR upgrades GitHub Action Runner image for macOS to `macos-12` as `macos-11` seems to have been removed.
>> 
>> See https://github.com/actions/runner-images?tab=readme-ov-file#available-images and https://github.com/actions/runner-images/issues/9255
>
> Johnny Lim has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   Upgrade GitHub Action Runner image for macOS to macos-13

Marked as reviewed by shade (Committer).

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PR Review: https://git.openjdk.org/jcstress/pull/152#pullrequestreview-2339972591