RFR: 8300732: Whitebox functions for Metaspace test should use byte size [v3]

[Thomas Stuefe]

On Tue, 16 Jul 2024 14:49:27 GMT, Sonia Zaldana Calles <szaldana at openjdk.org> wrote:

>> Hi all, 
>> 
>> This PR addresses [8300732](https://bugs.openjdk.org/browse/JDK-8300732) switching Whitebox Metaspace test functions to use bytes as opposed to words. 
>> 
>> Testing: 
>> - [x] `test/hotspot/jtreg/runtime/Metaspace` tests pass. 
>> 
>> Thanks, 
>> Sonia
>
> Sonia Zaldana Calles has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Feedback - updating Unit.valueOf to direct access

Still good.

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Marked as reviewed by stuefe (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20039#pullrequestreview-2181909030