RFR: 8319373: Serial: Refactor dirty cards scanning during Young GC [v9]

[Albert Mingkun Yang]

> Reading the new code directly is probably easier. The structure is quite similar to its counterpart in Parallel.
> 
> It's mostly perf-neutral, except when dirty cards are scarce. Using `card_scan.java` in [JDK-8310031](https://bugs.openjdk.org/browse/JDK-8310031), I observed ~40% reduction in young-gc pause time with `stride = 32 * 64`.

Albert Mingkun Yang 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 16 additional commits since the last revision:

 - Merge branch 'master' into s1-young-gc
 - review
 - next-obj-card
 - review
 - Merge branch 'master' into s1-young-gc
 - review
 - Update src/hotspot/share/gc/serial/cardTableRS.cpp
   
   Co-authored-by: Thomas Schatzl <59967451+tschatzl at users.noreply.github.com>
 - Update src/hotspot/share/gc/serial/cardTableRS.cpp
   
   Co-authored-by: Thomas Schatzl <59967451+tschatzl at users.noreply.github.com>
 - Update src/hotspot/share/gc/serial/cardTableRS.cpp
   
   Co-authored-by: Thomas Schatzl <59967451+tschatzl at users.noreply.github.com>
 - Update src/hotspot/share/gc/serial/cardTableRS.cpp
   
   Co-authored-by: Thomas Schatzl <59967451+tschatzl at users.noreply.github.com>
 - ... and 6 more: https://git.openjdk.org/jdk/compare/c0fe8d1f...8762a64a

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16492/files
  - new: https://git.openjdk.org/jdk/pull/16492/files/e8b8e0ba..8762a64a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16492&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16492&range=07-08

  Stats: 608510 lines in 887 files changed: 81377 ins; 469008 del; 58125 mod
  Patch: https://git.openjdk.org/jdk/pull/16492.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16492/head:pull/16492

PR: https://git.openjdk.org/jdk/pull/16492