RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v29]

[Johannes Bechberger]

On Wed, 4 Jun 2025 14:04:51 GMT, Patricio Chilano Mateo <pchilanomate at openjdk.org> wrote:

>> Ok, for now. We should try to come up with a better split.
>
> If there are sample requests then we are already in the slow path so loading again `has_cpu_time_jfr_requests()` later won't change anything. My suggestion would be to avoid passing this boolean around.

I removed it.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2126751794