RFR: 8374190: Convert ConcurrentHashTable atomic lists to use Atomic<T> [v2]

[Kim Barrett]

> Please review this change to ConcurrentHashTable to use `Atomic<Node*>` for
> the Node lists.  Note that this does not complete the replacement of direct
> uses of AtomicAccess by that class; there's still one more group remaining.
> 
> Testing: mach5 tier1-3

Kim Barrett has updated the pull request incrementally with one additional commit since the last revision:

  update copyrights

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28951/files
  - new: https://git.openjdk.org/jdk/pull/28951/files/0278f373..a12d25ff

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28951&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28951&range=00-01

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28951.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28951/head:pull/28951

PR: https://git.openjdk.org/jdk/pull/28951