RFR: 8331385: G1: Prefix HeapRegion helper classes with G1

[David Holmes]

On Mon, 1 Jul 2024 09:35:00 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   after [JDK-8330694](https://bugs.openjdk.org/browse/JDK-8330694) which renamed HeapRegion to G1HeapRegion, there were  a few related helper classes in this CR that were not renamed.
> 
> It's purely mechanical renaming without even further renaming of files etc.
> 
> This change updates them.
> 
> (Fwiw, the "Viewed" checkbox at the top right of the file change helps a lot review this change incrementally)
> 
> Testing: tier1, tier4, tier5
> 
> Thanks,
>   Thomas

Seems okay. Thanks

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/19967#pullrequestreview-2155206936