RFR: 8366829: Add constants for the Duration MIN/MAX values [v2]

[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 incrementally with two additional commits since the last revision:

 - 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   Note: any commit hashes below might be outdated due to subsequent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

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27534/files
  - new: https://git.openjdk.org/jdk/pull/27534/files/9a54ba1d..c5a3f228

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27534&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27534&range=00-01

  Stats: 20 lines in 3 files changed: 18 ins; 0 del; 2 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