RFR: 8339668: Parallel: Adopt PartialArrayState to consolidate marking stack in Full GC [v5]

[Zhengyu Gu]

> Please review this patch that adopts `PartialArrayState`introduced by [JDK-8337709](https://bugs.openjdk.org/browse/JDK-8337709) to consolidate `_oop_task_queues` and `_objarray_task_queues` into single `_marking_stacks`.
> 
> The change mirrors Kim's [JDK-8311163](https://bugs.openjdk.org/browse/JDK-8311163) work, therefore, there are methods can be consolidated and simplified, but I would like defer to a followup CR.

Zhengyu Gu has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 17 additional commits since the last revision:

 - Yang's comment
 - Merge branch 'master' into JDK-8339668
 - Adopt latest PartialArrayStats changes
 - Merge branch 'master' into JDK-8339668
 - Merge branch 'master' into JDK-8339668
 - @tschatzl's ScannerTask changes
 - @tschatzl's comment
 - v8
 - v7
 - v6
 - ... and 7 more: https://git.openjdk.org/jdk/compare/1203c1a7...332c1cdd

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21089/files
  - new: https://git.openjdk.org/jdk/pull/21089/files/0ed1a358..332c1cdd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21089&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21089&range=03-04

  Stats: 52336 lines in 3084 files changed: 19535 ins; 21788 del; 11013 mod
  Patch: https://git.openjdk.org/jdk/pull/21089.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21089/head:pull/21089

PR: https://git.openjdk.org/jdk/pull/21089