RFR: 8370890: Start of release updates for JDK 27

[Nizar Benalla]

Get JDK 27 underway.

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Commit messages:
 - initial commit start-of-JDK-27

Changes: https://git.openjdk.org/jdk/pull/28130/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28130&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8370890
  Stats: 90 lines in 34 files changed: 46 ins; 0 del; 44 mod
  Patch: https://git.openjdk.org/jdk/pull/28130.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28130/head:pull/28130

PR: https://git.openjdk.org/jdk/pull/28130