RFR: 8351565: Implement JEP 502: Stable Values (Preview) [v7]

[Per Minborg]

> Implement JEP 502.
> 
> The PR passes tier1-tier3 tests.

Per Minborg has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 249 commits:

 - Fix comments on doc issues
 - Create separate reentry prevention method and add tests
 - Merge branch 'master' into implement-jep502
 - Merge branch 'master' into implement-jep502
 - Clean up exception messages and fix comments
 - Rename field
 - Rename method and fix comment
 - Rework reenterant logic
 - Use acquire semantics for reading rather than volatile semantics
 - Add missing null check
 - ... and 239 more: https://git.openjdk.org/jdk/compare/fcc2a242...4c0dadfb

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

Changes: https://git.openjdk.org/jdk/pull/23972/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23972&range=06
  Stats: 4050 lines in 30 files changed: 4019 ins; 18 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/23972.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23972/head:pull/23972

PR: https://git.openjdk.org/jdk/pull/23972