RFR: 8304711: Combine G1 root region abort and wait into a single method [v2]

[Thomas Schatzl]

On Thu, 23 Mar 2023 09:15:29 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   merge root region scan and abort calls into a single method as they are used together twice; this also helps with [JDK-8300770](https://bugs.openjdk.org/browse/JDK-8300770) later.
>> 
>> Testing: gha
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   ayang review

Thanks for your reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/13145#issuecomment-1481752732