RFR: 8366829: Add java.time.Duration constants MIN and MAX [v4]

[Pavel Rappo]

> We have [recently discussed][] a possibility of adding the `Duration.MIN` and `Duration.MAX` constants. Can we now start implementation? If and when we are in agreement on this PR, I will file a CSR.
> 
> I drafted a minimal specification and added some tests. I tried to phrase the spec for `Duration.MIN` in a way that makes it clear that `Duration.MIN` is the most negative value and not the least positive.
> 
> [recently discussed]: https://mail.openjdk.org/pipermail/core-libs-dev/2025-September/151098.html

Pavel Rappo 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 five additional commits since the last revision:

 - Merge remote-tracking branch 'jdk/master' into 8366829
 - Respond to feedback
   
   Apply Stephen's suggestion on wording, although modified.
 - Update copyright years
   
   Note: any commit hashes below might be outdated due to subsequent
   history rewriting (e.g. git rebase).
   
    + update src/java.base/share/classes/java/time/temporal/ChronoUnit.java due to 9a54ba1d353
    + update test/jdk/java/time/tck/java/time/TCKDuration.java due to 9a54ba1d353
 - Provide @apiNote as suggested
 - Initial commit

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27534/files
  - new: https://git.openjdk.org/jdk/pull/27534/files/abe01ff5..9472772a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27534&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27534&range=02-03

  Stats: 44025 lines in 1299 files changed: 26033 ins; 11350 del; 6642 mod
  Patch: https://git.openjdk.org/jdk/pull/27534.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27534/head:pull/27534

PR: https://git.openjdk.org/jdk/pull/27534