RFR: 8367507: Parallel: Remove PSPromotionManager::drain_stacks_depth [v2]

[Thomas Schatzl]

On Fri, 12 Sep 2025 11:12:30 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Trivial renaming a method so that we can remove one of two methods with identical implementations, `drain_stacks` and `drain_stacks_depth`.
>> 
>> Test: tier1
>
> Albert Mingkun Yang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge branch 'master' into pgc-stack-merge
>  - pgc-stack-merge

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27252#pullrequestreview-3223215578