RFR: 8374350: Convert hotspot gtests to use Atomic<T> [v2]

[Axel Boldt-Christmas]

On Fri, 2 Jan 2026 10:19:59 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

>> Kim Barrett has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   update copyrights
>
> test/hotspot/gtest/gc/g1/test_g1BatchedGangTask.cpp line 60:
> 
>> 58:   }
>> 59: 
>> 60:   Atomic<bool>* _do_work_called_by;
> 
> Can we use `GrowableArrayCHeap<Atomic<bool>, MemTag::mtInternal>` instead, and skip the manual destruction (and element construction)?

Right Atomic are non copyable ofc. Ignore this. :)

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PR Review Comment: https://git.openjdk.org/jdk/pull/29001#discussion_r2657483493