RFR: 8339668: Parallel: Adopt PartialArrayState to consolidate marking stack in Full GC [v6]

[Zhengyu Gu]

On Sat, 25 Jan 2025 21:23:35 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

>> Please review this patch that adopts `PartialArrayState`introduced by [JDK-8337709](https://bugs.openjdk.org/browse/JDK-8337709) to consolidate `_oop_task_queues` and `_objarray_task_queues` into single `_marking_stacks`.
>> 
>> The change mirrors Kim's [JDK-8311163](https://bugs.openjdk.org/browse/JDK-8311163) work, therefore, there are methods can be consolidated and simplified, but I would like defer to a followup CR.
>
> Zhengyu Gu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   More cleanup based on Yang's comment

Thanks, @albertnetymk @tschatzl

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PR Comment: https://git.openjdk.org/jdk/pull/21089#issuecomment-2618997767