RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v42]

[Johannes Bechberger]

On Wed, 4 Jun 2025 18:38:42 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

>> I'm OK with fixing this separately.
>
> Please ensure that you file a follow-up issue on this matter.

Here it is https://bugs.openjdk.org/browse/JDK-8358619

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2127234787