RFR: 8356080: Address post-integration comments for Stable Values [v2]

[Per Minborg]

> This PR proposes to address comments in the initial PR for Stable Values, which were deferred until after integration.
> 
> Unfortunately, this PR shows the total commit history for stable values.

Per Minborg has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 384 commits:

 - Fix an issue with toString on nested constructs
 - Merge branch 'master' into jep502-followup
 - Merge branch 'master' into jep502-followup
 - Update src/java.base/share/classes/java/lang/StableValue.java
   
   Co-authored-by: Chen Liang <liach at openjdk.org>
 - Simplify furhter
 - Address comments in PR
 - Merge master
 - Remove unused method and add comment
 - Address comments
 - Merge branch 'master' into jep502-followup
 - ... and 374 more: https://git.openjdk.org/jdk/compare/900b3ff7...3eebd504

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Changes: https://git.openjdk.org/jdk/pull/25004/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25004&range=01
  Stats: 361 lines in 13 files changed: 243 ins; 49 del; 69 mod
  Patch: https://git.openjdk.org/jdk/pull/25004.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25004/head:pull/25004

PR: https://git.openjdk.org/jdk/pull/25004