RFR: 8342979: Start of release updates for JDK 25 [v6]

[Pavel Rappo]

> Prepare for JDK 25.

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 nine additional commits since the last revision:

 - Update --release 24 symbol information for JDK 24 build 24
   
   The macOS/AArch64 build 24 was taken from https://jdk.java.net/24/
 - Merge branch 'master' into 8342979
 - Update --release 24 symbol information for JDK 24 build 23
   
   The macOS/AArch64 build 23 was taken from https://jdk.java.net/24/
 - Merge branch 'master' into 8342979
 - Update --release 24 symbol information for JDK 24 build 22
   
   The macOS/AArch64 build 22 was taken from https://jdk.java.net/24/
 - Merge branch 'master' into 8342979
 - Update --release 24 symbol information for JDK 24 build 21
   
   The macOS/AArch64 build 21 was taken from https://jdk.java.net/24/
 - Add forgotten .jcheck/conf
 - Initial commit

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21763/files
  - new: https://git.openjdk.org/jdk/pull/21763/files/84dce9a3..354ed5a8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21763&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21763&range=04-05

  Stats: 111558 lines in 2961 files changed: 29381 ins; 72609 del; 9568 mod
  Patch: https://git.openjdk.org/jdk/pull/21763.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21763/head:pull/21763

PR: https://git.openjdk.org/jdk/pull/21763