8290000: Bump macOS GitHub actions to macOS 11

[gdams]

macOS 10.15 has been deprecated for some time and will be removed completely on August 30th. See https://github.com/actions/virtual-environments#available-environments and actions/runner-images#5583 for context.

This PR doesn't apply cleanly because it was added to the GitHub actions rewrite in tip. As it's unlikely that I will have a backported rewrite by August 30th my preference is to backport this way round.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8290000: Bump macOS GitHub actions to macOS 11

Reviewers

• Severin Gehwolf (@jerboaa - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u-dev pull/87/head:pull/87
$ git checkout pull/87

Update a local copy of the PR:
$ git checkout pull/87
$ git pull https://git.openjdk.org/jdk8u-dev pull/87/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 87

View PR using the GUI difftool:
$ git pr show -t 87

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk8u-dev/pull/87.diff

[bridgekeeper]

👋 Welcome back gdams! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 01: Full - Incremental (08cb4aae)
• 00: Full (c189f8a3)

[openjdk-notifier]

@gdams Please do not rebase or force-push to an active PR as it invalidates existing review comments. All changes will be squashed into a single commit automatically when integrating. See OpenJDK Developers’ Guide for more information.

[jerboaa]

Looks fine to me and GHA seems happy. Thumbs up!

[openjdk]

@gdams This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8290000: Bump macOS GitHub actions to macOS 11

Reviewed-by: sgehwolf

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 3 new commits pushed to the master branch:

• 1460bfa: Merge
• 2dadc2b: 8290832: It is no longer possible to change "user.dir" in the JDK8
• 244f98e: 8291568: Bump update version of OpenJDK: 8u345

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@jerboaa) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[gdams]

/integrate

[gdams]

Fix request is complete. @jerboaa are you willing to sponsor the change?

[openjdk]

@gdams
Your change (at version 08cb4aa) is now ready to be sponsored by a Committer.

[RealCLanger]

/sponsor

[openjdk]

Going to push as commit 39fa6fb.
Since your change was applied there have been 3 commits pushed to the master branch:

• 1460bfa: Merge
• 2dadc2b: 8290832: It is no longer possible to change "user.dir" in the JDK8
• 244f98e: 8291568: Bump update version of OpenJDK: 8u345

Your commit was automatically rebased without conflicts.

[openjdk]

@RealCLanger @gdams Pushed as commit 39fa6fb.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.