[jdk22u] RFR: 8326446: The User and System of jdk.CPULoad on Apple M1 are inaccurate [v3]

[Long Yang]

> Hi all
> 
> Could I have a review of this backport.
> 
> This pull request contains a backport of commit [8dbd4b391f7deb1a46a5f07f0bc46f23d6715ddb](https://github.com/openjdk/jdk/commit/8dbd4b391f7deb1a46a5f07f0bc46f23d6715ddb) from the [openjdk/jdk](https://github.com/openjdk/jdk) repository.
> 
> This backport is clean.
> 
> Testing: I ran test/jdk/jdk/jfr/event/os/TestCPULoad.java and passed.

Long Yang has updated the pull request incrementally with two additional commits since the last revision:

 - trigger GHA
 - trigger GHA

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

Changes:
  - all: https://git.openjdk.org/jdk22u/pull/161/files
  - new: https://git.openjdk.org/jdk22u/pull/161/files/e988afcf..528b2324

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk22u&pr=161&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk22u&pr=161&range=01-02

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk22u/pull/161.diff
  Fetch: git fetch https://git.openjdk.org/jdk22u.git pull/161/head:pull/161

PR: https://git.openjdk.org/jdk22u/pull/161