RFR: 8310183: Update GitHub Actions to use boot JDK for building jtreg

[Christian Stein]

On Fri, 16 Jun 2023 06:05:16 GMT, Christian Stein <cstein at openjdk.org> wrote:

> Please review this change to use the boot JDK for building jtreg when running on GitHub Actions.
> 
> This is a best-effort follow-up change to
> - #14448
> which didn't have the desired results - the `Bad address` error does still appear with using the pre-installed JDKs 11 and 17.
> 
> Tests using the boot JDK for building jtreg seem to be successful and more stable.

Yes, they seem related.

The error says in occasion: `realpath: bootjdk/jdk: No such file or directory`
Although one step before is has: `mv "$jdk_root"/* bootjdk/jdk/`

https://github.com/iklam/jdk/actions/runs/5292467822/jobs/9579580675#step:3:163

And yes, all worked on this run https://github.com/sormuras/jdk/actions/runs/5280848764 that was checked before merging this change. 🤔

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PR Comment: https://git.openjdk.org/jdk/pull/14507#issuecomment-1595158234