RFR: 8361950: Update to use jtreg 8 [v4]

[David Holmes]

On Thu, 4 Sep 2025 22:01:57 GMT, Christian Stein <cstein at openjdk.org> wrote:

>> Please review the change to update to using jtreg 8.
>> 
>> The primary change is to the `jib-profiles.js` file, which specifies the version of jtreg to use, for those systems that rely on this file. In addition, the requiredVersion has been updated in the various `TEST.ROOT` files.
>
> Christian Stein has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into JDK-8361950-jtreg-8
>  - Merge branch 'openjdk:master' into JDK-8361950-jtreg-8
>  - Update to use correct library directories
>    
>    See also: https://openjdk.org/jtreg/faq.html#how-do-i-find-the-path-for-the-testng-or-junit-jar-files
>  - 8361950: Set required version to 8+2
>  - 8361950: Update to use jtreg 8

I would appreciate it if this could hold off a while longer as we have a few issues causing noise in our testing at the moment and I don't want to muddy the waters even further. Thanks.

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PR Comment: https://git.openjdk.org/jdk/pull/26261#issuecomment-3264544890