RFR: 8253424: Add support for running pre-submit testing using GitHub Actions [v2]

[Andrew John Hughes]

On Wed, 27 Jul 2022 16:02:42 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Well, I don't see it running cleanly, so there seems to be no point in pushing it just yet. Was that intermittent? Can we run the GHA again for this PR?

Thanks for looking.

The Windows failure seems to be an intermittent failure in downloading Visual Studio and indeed it failed only for `release` and not `debug`.  It passed on an earlier run: https://github.com/gnu-andrew/shenandoah-jdk8u/actions/runs/2267320655 and the only recent changes have been to the `.jcheck` configuration.

The MacOS failure is a genuine failure in the Shenandoah 8u code on MacOS. I guess it's never been built there before. I think fixing that is either something to be done in a separate fix (not this backport) or we can decide to just exclude MacOS on Shenandoah 8u.

Failure is:

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PR: https://git.openjdk.org/shenandoah-jdk8u/pull/3