RFR: Implement JEP 509: JFR CPU-Time Profiling [v47]

[Johannes Bechberger]

> This is the code for the [JEP draft: CPU Time based profiling for JFR].
> 
> Currently tested using [this test suite](https://github.com/parttimenerd/basic-profiler-tests).
> 
> A version based on the cooperative sampling JEP can be found [here](https://github.com/parttimenerd/jdk/tree/parttimenerd_cooperative_cpu_time_sampler).

Johannes Bechberger has updated the pull request incrementally with one additional commit since the last revision:

  Simplify local trace stack

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/20752/files
  - new: https://git.openjdk.org/jdk/pull/20752/files/ed67e11a..93fe0e97

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20752&range=46
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20752&range=45-46

  Stats: 91 lines in 4 files changed: 36 ins; 33 del; 22 mod
  Patch: https://git.openjdk.org/jdk/pull/20752.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20752/head:pull/20752

PR: https://git.openjdk.org/jdk/pull/20752