RFR: 8330027: Identity hashes of archived objects must be based on a reproducable random seed

[Thomas Stuefe]

CDS archive contains archived objects with identity hashes.

These hashes are deliberately preserved or even generated during dumping. They are generated based on a seed that is initialized randomly on a per-thread basis. These generations precede CDS dump initialization, so they are not affected by the init_random call there or by the changes of [JDK-8323900](https://bugs.openjdk.org/browse/JDK-8323900).

A random seed will not work for dumping archives since it prevents reproducible archive generation. Therefore, when dumping, these seeds must be initiated in a reproducible way.

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Commit messages:
 - fix

Changes: https://git.openjdk.org/jdk/pull/18735/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18735&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330027
  Stats: 35 lines in 5 files changed: 28 ins; 1 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/18735.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18735/head:pull/18735

PR: https://git.openjdk.org/jdk/pull/18735