RFR: 8343227: GenShen: Fold resource mark into management of preselected regions [v2]

[Kelvin Nilsen]

On Tue, 29 Oct 2024 21:21:08 GMT, William Kemper <wkemper at openjdk.org> wrote:

>> `ShenandoahCollectionSetPreselector` manages a resource scoped array. It makes sense to move the `ResourceMark` into this class.
>
> William Kemper has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix builds

Marked as reviewed by kdnilsen (Committer).

-------------

PR Review: https://git.openjdk.org/shenandoah/pull/530#pullrequestreview-2405654663