RFR: 8368780: IGV: Upgrade to Netbeans Platform 27

Wed Oct 1 08:34:53 UTC 2025

This PR upgrades IGV and its dependencies to the newest Netbeans Platform 27, released on August 21, 2025. It also supports running the latest (LTS) JDK 25. 

It has been tested that IGV still behaves as expected after the upgrade.

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Commit messages:
 - Update copyright years
 - Update README
 - Move Nashorn version definition and update it
 - Fix for new annotation policy from JDK 23
 - Update IGV Java version requirement

Changes: https://git.openjdk.org/jdk/pull/27579/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27579&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368780
  Stats: 11 lines in 3 files changed: 4 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/27579.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27579/head:pull/27579

PR: https://git.openjdk.org/jdk/pull/27579