RFR: Testing GHA [v4]

[Jorn Vernee]

On Mon, 28 Mar 2022 10:54:34 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> Add a basic actions workflow that runs the tests on pull requests
>
> Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Set sepcific ubuntu version

I'll wait for actions to be turned on for this repo. That should allow us to give this another test run before integrating.

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PR: https://git.openjdk.java.net/jextract/pull/6