RFR: 8339238: Update to use jtreg 7.5.1 [v2]

[Jaikiran Pai]

On Fri, 14 Feb 2025 17:50:57 GMT, Christian Stein <cstein at openjdk.org> wrote:

>> Please review the change to update to using jtreg 7.5.1.
>> 
>> 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.
>> 
>> Tested with tier 1 — tier 8.
>
> Christian Stein has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update TEST.ROOT in `test/docs`

Marked as reviewed by jpai (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/20766#pullrequestreview-2625464354