RFR: 8374695: ZGC: Convert zTLABUsage to use Atomic<T> [v2]

[Thomas Schatzl]

On Mon, 19 Jan 2026 06:20:09 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

>> Convert usages of AtomicAccess to Atomic<T> in zTLABUsage.
>> 
>> Testing:
>>  * GHA
>>  * HotSpot GC tests with ZGC linux x64 and linux aarch64
>
> Axel Boldt-Christmas has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove superfluous space

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29271#pullrequestreview-3686366052