RFR: JDK-8309934: Update GitHub Actions to use JDK 17 for building jtreg [v2]

[Thomas Stuefe]

On Tue, 13 Jun 2023 13:52:53 GMT, Christian Stein <cstein at openjdk.org> wrote:

>> Please review this change to use the pre-installed JDK 17 for building jtreg when running on GitHub Actions.
>
> Christian Stein has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update action.yml

Do you know why this helped? 

Will you downport this to JDK 17 too?

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PR Comment: https://git.openjdk.org/jdk/pull/14448#issuecomment-1590866275