RFR: 8343189: [REDO] JDK-8295269 G1: Improve slow startup due to predictor initialization

[Thomas Schatzl]

Hi all,

  please review this redo of [JDK-8295269](https://bugs.openjdk.org/browse/JDK-8295269) G1: Improve slow startup due to predictor initialization. The cause are issues with the `runtime/cds/DeterministicDump.java` test, that is currently being fixed in #21871.

There has been no change in these changes.

Testing: running a few thousand times with the fixed `runtime/cds/DeterministicDump.java` test

Thanks,
  Thomas

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Depends on: https://git.openjdk.org/jdk/pull/21871

Commit messages:
 - Revert "8343086: [BACKOUT] JDK-8295269 G1: Improve slow startup due to predictor initialization"

Changes: https://git.openjdk.org/jdk/pull/21876/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21876&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343189
  Stats: 7 lines in 2 files changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21876.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21876/head:pull/21876

PR: https://git.openjdk.org/jdk/pull/21876