RFR: 8295871: G1: Use different explicit claim marks for CLDs [v3]

[Thomas Schatzl]

On Wed, 9 Nov 2022 13:17:03 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   ayang review
>
> If the same technique can be used by Serial/Parallel (I believe so), I'd prefer sth more generic, `_claim_stw_fullgc_mark/adjust`.
> 
> (I am surprised that `_claim_finalizable` is used only by ZGC -- this essentially mirrors finalizable/strong marking, needed for conc ref-processing.)

Thanks @albertnetymk @kstefanj for your reviews

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

PR: https://git.openjdk.org/jdk/pull/10989