[jdk25] RFR: 8364258: ThreadGroup constant pool serialization is not normalized

[Markus Grönlund]

8364258: ThreadGroup constant pool serialization is not normalized

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Commit messages:
 - Backport 3bc449797eb59f9770d2a06d260b23b6efd5ff0f

Changes: https://git.openjdk.org/jdk/pull/26618/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26618&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364258
  Stats: 938 lines in 12 files changed: 431 ins; 482 del; 25 mod
  Patch: https://git.openjdk.org/jdk/pull/26618.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26618/head:pull/26618

PR: https://git.openjdk.org/jdk/pull/26618