RFR: 8323900: Avoid calling os::init_random() in CDS static dump

[Ioi Lam]

The purpose of the PR is to avoid modifying the global JVM state while dumping the CDS archive.

When updating the identity hashcode for archived Symbols, call `ArchiveBuilder::current()->entropy()` instead of `os::random()`. As a result, CDS no longer needs to call `os::init_random()` with a deterministic seed.

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Commit messages:
 - 8323900: Avoid calling os::init_random() in CDS static dump

Changes: https://git.openjdk.org/jdk/pull/18728/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18728&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323900
  Stats: 24 lines in 4 files changed: 14 ins; 6 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/18728.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18728/head:pull/18728

PR: https://git.openjdk.org/jdk/pull/18728