RFR: 8330694: Rename 'HeapRegion' to 'G1HeapRegion' [v4]

[Thomas Schatzl]

On Sat, 27 Apr 2024 02:34:21 GMT, Lei Zaakjyu <duke at openjdk.org> wrote:

>> follow up 8267941
>
> Lei Zaakjyu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix indentation

mach5 higher tier SA tests are fine.
What are your plans for the remaining SA renames (would highly recommend to add) and the G1HeapRegion related helper classes?

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PR Comment: https://git.openjdk.org/jdk/pull/18871#issuecomment-2082124530