RFR: 8319161: GC: Make TestParallelGCThreads use createTestJavaProcessBuilder [v2]

[Ramkumar Sunderbabu]

On Tue, 2 Dec 2025 13:12:09 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Ramkumar Sunderbabu has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   separating test sections
>
> Could you update the summary of this PR to reflect the final change? Could you also indicate that you have rerun the testing with the latest changes?

Thanks @stefank and @walulyai for your reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/28566#issuecomment-3626146172