RFR: 8370890: Start of release updates for JDK 27 [v5]

[Nizar Benalla]

> Get JDK 27 underway.

Nizar Benalla 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 seven additional commits since the last revision:

 - Merge branch 'master' into start-of-release-27
 - Updates due to the generate-symbol-data.sh location changing in 8367259
 - Updates due to the generate-symbol-data.sh location changing in 8367259
 - Merge branch 'master' into start-of-release-27
 - update links to JVMS 26 and 27
 - add missing enum
 - initial commit start-of-JDK-27

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28130/files
  - new: https://git.openjdk.org/jdk/pull/28130/files/0652d5d3..3d9eb308

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28130&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28130&range=03-04

  Stats: 14293 lines in 184 files changed: 9629 ins; 3659 del; 1005 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