RFR: 8342979: Start of release updates for JDK 25 [v2]

[Pavel Rappo]

> Prepare for JDK 25.

Pavel Rappo has updated the pull request incrementally with one additional commit since the last revision:

  Add forgotten .jcheck/conf

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21763/files
  - new: https://git.openjdk.org/jdk/pull/21763/files/fc851b94..64e9326b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21763&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21763&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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